SL/R230: Hotline Archive: The engine has a misfire SL500
05-19-2020, 04:30 AM
#1
Hotline Archive: The engine has a misfire SL500
Having access to the biggest USA workshop live hotline databases, I will publish them here and might help some.
Customer Concern: The engine has a misfire.
Average Reported Mileage: 111842
Tests/Procedures:
1. Identify misfiring cylinder. The scan tool may be incorrect.
2. Reset ring gear adaptations with scan tool. Note: This should be done after each test step.
3. Connect fuel pressure gauge, should have around 58 PSI. Test during road test to verify pressure does not drop under load.
4. If fuel pressure drops after engine is shut off, lift fuel rail and check for leaking fuel injectors at misfiring cylinder.
5. Test fuel for contamination.
6. Inspect wiring harness going to injectors and coils for torn wiring insulation. Pay close attention to wiring resting on valve covers and injector rail.
7. Swap coil and spark plug wires from misfiring cylinder to known good cylinder. Note different length wires as indicated by the letter stamped on them. Ohm out plug wires. Specification is stamped on the wire itself. Most wires ohm out to 2.2 Kohms.
8. Inspect and swap spark plugs, cylinder to cylinder.
9. Smoke test for intake vacuum leaks.
10. Verify EGR valve is not stuck open. Apply vacuum to the valve in order to open it then quickly remove it to snap the valve closed.
11. Perform inspection for issues with the valve train or compression. This includes compression, cylinder leakdown, and running compression. Compare compression reading with known good cylinders to identify low output from a cylinder.
Tech Tips: Resetting of ring gear adaptation with the scan tool is needed to reset the engine computer's memory of misfire adaptations.
Diagnostic Codes
P0300
Confirmed Fix Summary
Confirmed Fix
47 - Replaced Spark Plug Wire(s)
38 - Replaced/Information Only Ignition Coil(s)
15 - Replaced/Cleaned Spark Plug Wire(s) and Replaced Spark Plug(s)
13 - Replaced Catalytic Converter(s)
11 - Replaced Spark Plug(s)
11 - Reset/Relearned/Performed Flywheel Ring Gear Adaptation
10 - Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
8 - Performed Crankshaft Position Sensor (CKP) Relearn
8 - Replaced Mass Air Flow (MAF) Sensor
8 - Replaced/Cleaned Fuel Injector(s)
5 - Replaced Crankshaft Position (CKP) Sensor
3 - Replaced Fuel Pump
3 - Replaced Exhaust Gas Recirculation (EGR) Valve
3 - Repaired Fuel Injector Wiring
3 - Reset Flywheel Ring Gear Adaptation and Replaced Spark Plug Wire(s)
3 - Performed/Replaced Engine Tune Up and Replaced Ignition Coil(s)
2 - Replaced Fuel Filter/Regulator Assembly
2 - Performed Fuel Injector Cleaner
2 - Replaced Ignition Coil(s) and Replaced Spark Plug(s)
2 - Replaced/Flushed Gasoline
2 - Replaced Intake Manifold Gasket(s)
1 - Replaced Engine
1 - Replaced Ignition Coil(s) and Replaced Powertrain Control Module (PCM)
1 - Performed Engine Tune Up
1 - Replaced Fuel Filter
1 - Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s)
1 - Cleaned Combustion Chambers
1 - Replaced Electronic Control Unit (ECU)
1 - Replaced Spark Plug Boot(s)
1 - Replaced Catalytic Converter(s) and Replaced Spark Plug Wire(s)
1 - Replaced Fuel Injector(s) and Replaced Ignition Coil(s)
1 - Reset Crankshaft Position (CKP) Sensor and Performed Fuel Adaptation Erase/Relearn
1 - Replaced Catalytic Converter(s) and Performed Crankshaft Position Sensor (CKP) Relearn
1 - Replaced Motor Mount(s) and Replaced Spark Plug(s)
1 - Replaced EGR Valve Actuator
1 - Replaced Transmission Fluid Cooler
1 - Reset Flywheel Ring Gear Adaptation and Replaced Fuel Injector(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
1 - Replaced Breather Hose and Replaced Fuel Pump
1 - Replaced Brake Booster Vacuum Supply Hose and Replaced Mass Air Flow (MAF) Sensor
1 - Replaced Fuel Filter and Replaced Spark Plug Wire(s)
1 - Replaced Crankshaft Position (CKP) Sensor and Performed Crankshaft Position Sensor (CKP) Relearn
1 - Performed Crankshaft Position Sensor (CKP) Relearn and Replaced Spark Plug(s)
1 - Cleaned Engine Carbon and Cleaned Fuel Injector(s)
Confirmed Fix Details
Tech Reported Fix Details Confirmed Fix
September 24, 2015 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Spark Plug Wire(s)
- fuel injector for #6 would shut off after 60 seconds of engine operation with spark still present. swapped plug wires to cyl #2 and injector shutoff followed wires. Mercedes misfire detection was flagging cyl three, found bad cyl with cancellation test which was cyl 6
Replaced Spark Plug Wire(s)
October 28, 2016 2002 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, USA *
Spark Plug Wire(s)
- There are 12 spark plugs and 12 wires on this 6-cylinder engine. Each wire contains a 2 kilo-ohm resistor. All the wires I measured had "out of limits" resistance. Runs fine now.
Replaced Spark Plug Wire(s)
January 5, 2010 2001 Mercedes-Benz E320, 3.2L, V6, Des 112.941, USA *
Spark Plug Wire(s)
- Had a bad plug wire. Both wires to each cylinder have to be good for the cylinder to fire.
Replaced Spark Plug Wire(s)
August 16, 2015 2003 Mercedes-Benz C320, 4Matic 3.2L, V6, Des 112.953, USA *
Spark Plug Wire(s)
- Wires were burnt inside on spark plug end replace wires and plugs verified repair
Replaced Spark Plug Wire(s)
June 11, 2019 2001 Mercedes-Benz SLK230, Kompressor 2.3L, L4, Des 111.983, USA *
Spark Plug Wire(s)
- p0303/p0304. someone swapped coil wires between number 3 and 4.
Replaced Spark Plug Wire(s)
December 20, 2013 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Spark Plug Wire(s)
- scoped ignition system had bad spark plug wires
Replaced Spark Plug Wire(s)
November 27, 2013 2002 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, USA *
Spark Plug Wire(s)
- valve cover gaskets and spark plug wire set
Replaced Spark Plug Wire(s)
December 5, 2016 2005 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Spark Plug Wire(s)
- Replaced Spark Plug Wire(s)
Replaced Spark Plug Wire(s)
July 27, 2011 2002 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Spark Plug Wire(s)
- SPARK PLUG WIRES
Replaced Spark Plug Wire(s)
10(+) 11-47 Joseph Schulte
June 14, 2014 2001 Mercedes-Benz CLK430, 4.3L, V8, Des 113.943, USA *
Spark Plug Wire(s)
- wire set
Replaced Spark Plug Wire(s)
January 21, 2019 2001 Mercedes-Benz C320, 3.2L, V6, MFI, USA *
Ignition Coil(s)
- Engine had rough idle, no misfire codes and no performance issues on the highway. One leg of coil #5 was firing and not the other, replaced coil and problem is gone. smh
Replaced Ignition Coil(s)
March 21, 2017 2002 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Ignition Coil(s)
- Valve cover vent cover was leaking and oil had saturated coils, wires and leaking into spark plug holes. Replaced coils, valve cover gaskets and re-sealed top cover.
Replaced Ignition Coil(s)
February 25, 2019 1999 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Ignition Coil(s)
- seemed like random misfire. probed coils with ignition probe and modis, found 1 coil with bad pattern. replaced coil, now good.
Replaced Ignition Coil(s)
February 20, 2019 2005 Mercedes-Benz CL500, 5.0L, V8, MFI, USA *
Ignition Coil(s)
- Moved ignition coil to another cylinder and performed power balance test/smooth running test. Misfire followed ign coil.
Replaced Ignition Coil(s)
May 1, 2018 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Ignition Coil(s)
- coil was problem but replaced plugs and wires due to mileage.
Replaced Ignition Coil(s)
October 20, 2011 2005 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Ignition Coil(s)
- FOUND CORROSION ON #5 COIL AND WIRES REPLACE WITH NEW NOW OK
Replaced Ignition Coil(s)
July 26, 2016 2004 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Ignition Coil(s)
- CLYINDER 2 HAD CORRODED TERMINALS ON THE COIL.
Replaced Ignition Coil(s)
July 26, 2012 2001 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Ignition Coil(s)
- Replaced #7 ignition coil
Replaced Ignition Coil(s)
May 18, 2013 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Ignition Coil(s)
- replaced ignition coils
Replaced Ignition Coil(s)
July 4, 2014 2003 Mercedes-Benz ML500, 5.0L, V8, MFI, Bore 3.81In Stroke 3.31In, Bore 97.00mm Stroke 84.00mm, USA *
Ignition Coil(s)
- Faulty ignition coils
Replaced Ignition Coil(s)
March 13, 2012 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
- Intermittant misfire. Replace valve cover gaskets, spark plugs. Cleaned ignition cables. Replaced left and right catalytic converter pipe assemblies(exhaust restriction causing oil leaks due to crankcase pressure build-up)Done deal
Cleaned Spark Plug Wire(s) and Replaced Spark Plug(s)
March 13, 2018 1999 Mercedes-Benz SLK230, Kompressor 2.3L, L4, Des 111.973, USA *
Spark Plug Wire(s)
Spark Plug(s)
- Replaced Spark Plug Wire(s) and Replaced Spark Plug(s) -wire is broken (tech Jasmin)
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
July 7, 2013 2000 Mercedes-Benz C280, 2.8L, V6, Des 112.920, USA *
Spark Plug Wire(s)
Spark Plug(s)
- plugs and wires wires were bad and plugs were fouled
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
November 16, 2010 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
- replace spark plugs and wires that fix it
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
October 19, 2010 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
- replace plugs and wires and that was it
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
January 19, 2011 2002 Mercedes-Benz ML500, 5.0L, V8, MFI, Bore 3.82In Stroke 3.31In, Bore 97.0mm Stroke 84.0mm, USA *
Spark Plug Wire(s)
Spark Plug(s)
- spark plugs and spark plug wires
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
November 8, 2010 2000 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
- replace plugs and wires
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
August 23, 2016 2003 Mercedes-Benz SL500, 5.0L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
36,000 miles Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
March 26, 2016 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Spark Plug Wire(s)
Spark Plug(s)
55,000 miles Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
May 28, 2014 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Spark Plug Wire(s)
Spark Plug(s)
126,139 miles Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
March 25, 2018 2004 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Catalytic Converter(s)
- Test Drive the vehicle to listen for sounds from the bottom of the vehicle. If you hear noises inspect catalytic convertors. All the (four) mis-fire codes were from the left bank. We moved all the coils and plugs to the right side bank and the misfires did not move. Changed out the Left Side cat.
Replaced Catalytic Converter(s)
May 13, 2015 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Catalytic Converter(s)
- Had no power when you pressed the accelerator and Had all misfires on the left bank only, P2050 Multiple misfire, P2054 #6 misfire, P2056 #5 misfire, P2052 #4 misfire, left bank converter was restricted, replaced both
Replaced Catalytic Converter(s)
March 14, 2018 2003 Mercedes-Benz E320, 3.2L, V6, Des 112.941, USA *
Catalytic Converter(s)
- Right bank catalytic converter fell apart on the inside and would cause a restriction in the pipe causing right bank of cylinders to mis fire.
Replaced Catalytic Converter(s)
August 10, 2015 1999 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Catalytic Converter(s)
- DID A BACKP RESSURE TEST ON EXHAUST SYSTEM PRE AND POST CATALYST, HAD 15 PSI BACK PRESSURE BEFORE CATS AND ONLY 2 PSI AFTER
Replaced Catalytic Converter(s)
July 21, 2015 2002 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Catalytic Converter(s)
- Check back pressure, disconnect exhaust pipe,replace front catalytic converter,road test OK
Replaced Catalytic Converter(s)
April 4, 2018 2003 Mercedes-Benz SL500, 5.0L, V8, MFI, USA *
Catalytic Converter(s)
- Bank 2 O2 sensor failed lean, both bank 2 cat. converters plugged up from excessive fuel.
Replaced Catalytic Converter(s)
April 20, 2016 2001 Mercedes-Benz C320, 3.2L, V6, MFI, USA *
Catalytic Converter(s)
- Misfire on #1 and #3 only. Found secondary catalytic converter came apart.
Replaced Catalytic Converter(s)
June 7, 2011 2003 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Catalytic Converter(s)
- Left side cat loose and plugged, refer to dealer for cat replacment
Replaced Catalytic Converter(s)
April 5, 2012 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Catalytic Converter(s)
- passenger side cat's restricted flow when engine warmed up
Replaced Catalytic Converter(s)
April 26, 2011 2000 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Catalytic Converter(s)
- replace cat.converters misfires were gone
Replaced Catalytic Converter(s)
December 11, 2018 2001 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Flywheel Ring Gear Adaptation Reset Flywheel Ring Gear Adaptation
June 27, 2018 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Flywheel Ring Gear Adaptation
- Sent to dealer to have the adaptations reset.
13,000 miles Relearned Flywheel Ring Gear Adaptation
July 27, 2017 2003 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Flywheel Ring Gear Adaptation
225,240 miles Performed Flywheel Ring Gear Adaptation
May 1, 2016 2006 Mercedes-Benz CLS500, 5.0L, V8, MFI, USA *
Flywheel Ring Gear Adaptation Reset Flywheel Ring Gear Adaptation
March 26, 2016 1998 Mercedes-Benz E430, 4.3L, V8, Des 113.940, USA *
Flywheel Ring Gear Adaptation
- This repaired the misfire after the tune up was performed.
121,000 miles Reset Flywheel Ring Gear Adaptation
October 21, 2015 2000 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Flywheel Ring Gear Adaptation
109,059 miles Reset Flywheel Ring Gear Adaptation
May 26, 2015 2004 Mercedes-Benz E320, 3.2L, V6, Des 112.949, USA *
Flywheel Ring Gear Adaptation
145,000 miles Reset Flywheel Ring Gear Adaptation
June 5, 2014 2003 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Flywheel Ring Gear Adaptation
161,988 miles Reset Flywheel Ring Gear Adaptation
February 8, 2012 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Flywheel Ring Gear Adaptation
43,051 miles Reset Flywheel Ring Gear Adaptation
September 22, 2010 1999 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Flywheel Ring Gear Adaptation
- Sent to dealer to reset. Had previous catalytic converter damage.
161,000 miles Reset Flywheel Ring Gear Adaptation
June 29, 2015 2006 Mercedes-Benz ML500, 5.0L, V8, MFI, USA *
Spark Plug(s)
- monitored scan tool data for misfire on cyl 7
Replaced Spark Plug(s)
February 18, 2019 2000 Mercedes-Benz SLK230, Kompressor 2.3L, L4, Des 111.973, USA *
Spark Plug(s)
- replaced spark plugs
Replaced Spark Plug(s)
March 1, 2013 1999 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Spark Plug(s)
- tune up
Replaced Spark Plug(s)
July 15, 2019 2001 Mercedes-Benz SLK230, Kompressor 2.3L, L4, Des 111.983, USA *
Spark Plug(s) Replaced Spark Plug(s)
December 6, 2018 2004 Mercedes-Benz E320, 3.2L, V6, Des 112.949, USA *
Spark Plug(s) Replaced Spark Plug(s)
June 27, 2018 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Spark Plug(s)
- Performed tune up and engine ran much better.
92,000 miles Replaced Spark Plug(s)
April 15, 2018 2003 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Spark Plug(s) Replaced Spark Plug(s)
April 6, 2016 2003 Mercedes-Benz E320, 3.2L, V6, Des 112.941, USA *
Spark Plug(s) Replaced Spark Plug(s)
March 13, 2015 1999 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Spark Plug(s) Replaced Spark Plug(s)
10(+) 11-11 Eddie Lakkis
October 22, 2014 2001 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Spark Plug(s) Replaced Spark Plug(s)
July 17, 2014 2000 Mercedes-Benz C280, 2.8L, V6, Des 112.920, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- Could not identify mifiring cylinder. started to perform ignition tune- up. tested ignition coils output. found 2 ignition coils bad- only producing spark out of 1 terminal. replaced 2 coils, plugs , & wires. car runs great now.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
February 17, 2016 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- P0300, P0301. Carbon tracking on cyl 1 spark plug and wire. Ignition misfire present on scope patterns of 3 & 4 also.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
August 10, 2015 2005 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- found plugs fouled also burning oil. replaced plugs,wires and coils.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
July 25, 2016 2000 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- Replace#5 ignition coil, all spark plugs and wires.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
May 2, 2018 2005 Mercedes-Benz ML350, 3.7L, V6, MFI, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- 1 coil, plugs and wires
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
March 24, 2020 2006 Mercedes-Benz ML500, 5.0L, V8, MFI, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- pull plugs
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
October 17, 2016 2004 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
189,423 miles Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
October 7, 2015 2002 Mercedes-Benz G500, 5.0L, V8, MFI, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s) Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
9 CJ Bailey
September 27, 2011 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Ignition Coil(s)
- #2 Ignition Coil
Spark Plug Wire(s)
Spark Plug(s)
70,000 miles Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
10 Carey Elliott
September 30, 2010 2002 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, USA *
Ignition Coil(s)
- #5 Ignition Coil
Spark Plug Wire(s)
Spark Plug(s)
89,606 miles Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
August 3, 2016 2003 Mercedes-Benz E320, 3.2L, V6, Des 112.949, USA *
Crankshaft Position Sensor (CKP) Relearn
- Performed Crankshaft Position Sensor (CKP) Relearn
Performed Crankshaft Position Sensor (CKP) Relearn
April 9, 2018 2003 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn Performed Crankshaft Position Sensor (CKP) Relearn
June 24, 2014 2000 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Crankshaft Position Sensor (CKP) Relearn
121,180 miles Performed Crankshaft Position Sensor (CKP) Relearn
May 27, 2014 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Crankshaft Position Sensor (CKP) Relearn
59,222 miles Performed Crankshaft Position Sensor (CKP) Relearn
February 20, 2014 1999 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Crankshaft Position Sensor (CKP) Relearn
195,613 miles Performed Crankshaft Position Sensor (CKP) Relearn
April 10, 2013 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn
39,714 miles Performed Crankshaft Position Sensor (CKP) Relearn
September 20, 2012 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn
43,000 miles Performed Crankshaft Position Sensor (CKP) Relearn
June 1, 2011 2004 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn
87,000 miles Performed Crankshaft Position Sensor (CKP) Relearn
May 11, 2015 2005 Mercedes-Benz ML350, 3.7L, V6, MFI, USA *
Fuel Injector(s)
- Number four injector had 7 ohms, it was drawing current from number 5 and 6 which had 16 ohms, replaced number four injector smooth running values of 5 and 6 went normal, car runs smooth!
Replaced Fuel Injector(s)
February 20, 2015 2003 Mercedes-Benz SLK320, 3.2L, V6, MFI, USA *
Fuel Injector(s)
- #4 injector inop when cold - replaced
Replaced Fuel Injector(s)
November 7, 2013 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Fuel Injector(s)
- Replace injector with OE unit.
Replaced Fuel Injector(s)
June 18, 2013 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Fuel Injector(s)
- injector cylinder 3
Replaced Fuel Injector(s)
February 24, 2019 2004 Mercedes-Benz ML500, 5.0L, V8, MFI, Bore 3.81In Stroke 3.31In, Bore 97.00mm Stroke 84.00mm, USA *
Fuel Injector(s) Replaced Fuel Injector(s)
February 17, 2019 2006 Mercedes-Benz SL500, 5.0L, V8, Des 113.963, USA *
Fuel Injector(s) Cleaned Fuel Injector(s)
March 3, 2016 1998 Mercedes-Benz ML320, 3.2L, V6, SOHC, USA *
Fuel Injector(s)
- Had two injectors that were stuck open.
Fuel Injector(s)
- Had two injectors that were stuck open.
Replaced Fuel Injector(s)
May 13, 2013 2005 Mercedes-Benz E320, 4Matic 3.2L, V6, Gas, Asp N, Des 112.954, 18V, SOHC, USA *
Fuel Injector(s)
147,000 miles Replaced Fuel Injector(s)
August 30, 2016 2000 Mercedes-Benz E320, 3.2L, V6, Des 112.941, SOHC, USA *
Mass Air Flow (MAF) Sensor
- only on full throttle would shut injectors off cause missfire 1 bank 456 shut car off restart would be fine till full throttle
Replaced Mass Air Flow (MAF) Sensor
June 6, 2013 2006 Mercedes-Benz CLS500, 5.0L, V8, MFI, USA *
Mass Air Flow (MAF) Sensor
- hesitation,p0101 and p0102, faulty maf sensor, replaced and cleared codes.
Replaced Mass Air Flow (MAF) Sensor
December 8, 2010 2003 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Mass Air Flow (MAF) Sensor
- mass air sensor
Replaced Mass Air Flow (MAF) Sensor
December 8, 2010 2003 Mercedes-Benz C320, 4Matic 3.2L, V6, Des 112.953, USA *
Mass Air Flow (MAF) Sensor
- mass air sensor
Replaced Mass Air Flow (MAF) Sensor
July 15, 2017 2005 Mercedes-Benz SL500, 5.0L, V8, MFI, USA *
Mass Air Flow (MAF) Sensor
- Replaced Mass air flow sensor, cleared codes and reset Adaptations
Replaced Mass Air Flow (MAF) Sensor
September 29, 2015 2000 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Mass Air Flow (MAF) Sensor Replaced Mass Air Flow (MAF) Sensor
May 6, 2015 2000 Mercedes-Benz C280, 2.8L, V6, Des 112.920, USA *
Mass Air Flow (MAF) Sensor Replaced Mass Air Flow (MAF) Sensor
August 1, 2011 1999 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Mass Air Flow (MAF) Sensor
113,000 miles Replaced Mass Air Flow (MAF) Sensor
July 9, 2015 2002 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Crankshaft Position (CKP) Sensor
- Vehicle had intermittent miss fire and finally engine just stalled with no codes set / let cool down and engine started right up / replaced crank sensor and car has been running fine for over 3 weeks
Replaced Crankshaft Position (CKP) Sensor
October 20, 2011 2006 Mercedes-Benz CLS500, 5.0L, V8, MFI, USA *
Crankshaft Position (CKP) Sensor
- Changed the crankshaft position sensor
Replaced Crankshaft Position (CKP) Sensor
May 18, 2012 2006 Mercedes-Benz CLS500, 5.0L, V8, MFI, USA *
Crankshaft Position (CKP) Sensor
- crankshaft position sensor
Replaced Crankshaft Position (CKP) Sensor
October 24, 2016 2005 Mercedes-Benz E320, 4Matic 3.2L, V6, Gas, Asp N, Des 112.954, 18V, SOHC, USA *
Crankshaft Position (CKP) Sensor Replaced Crankshaft Position (CKP) Sensor
December 29, 2015 1999 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Crankshaft Position (CKP) Sensor
100,000 miles Replaced Crankshaft Position (CKP) Sensor
October 24, 2015 2004 Mercedes-Benz SL500, 5.0L, V8, MFI, USA
Engine Tune Up
Ignition Coil(s)
- major tune up with coils
Replaced Engine Tune Up and Replaced Ignition Coil(s)
October 10, 2015 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Engine Tune Up
Ignition Coil(s)
- full tune with coil for bad cylander
Performed Engine Tune Up and Replaced Ignition Coil(s)
November 8, 2015 2006 Mercedes-Benz SL500, 5.0L, V8, Des 113.963, USA *
Engine Tune Up
Ignition Coil(s)
- major tune with 3 coils
Performed Engine Tune Up and Replaced Ignition Coil(s)
April 22, 2014 2001 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Exhaust Gas Recirculation (EGR) Valve
- lack of power and enigine misses at idle Secondary ignition components good No codes fuel pressure and quality good Low engine vacuum When disabling injectors each one on left bank made a diference Nothing on the right side. Exahust back pressureok. Faulty EGR stuck open. Confirmed fix
Replaced Exhaust Gas Recirculation (EGR) Valve
May 20, 2015 2004 Mercedes-Benz S500, 5.0L, V8, Des 113.960, USA *
Exhaust Gas Recirculation (EGR) Valve
- it was missing on all cyls and popping back into the intake ,unplugged the vac line and the engine smoothed out
Replaced Exhaust Gas Recirculation (EGR) Valve
April 24, 2013 2005 Mercedes-Benz ML350, 3.7L, V6, MFI, USA *
Exhaust Gas Recirculation (EGR) Valve
119,981 miles Replaced Exhaust Gas Recirculation (EGR) Valve
March 26, 2016 2001 Mercedes-Benz E320, 3.2L, V6, Des 112.941, USA *
Flywheel Ring Gear Adaptation
Spark Plug Wire(s)
134,624 miles Reset Flywheel Ring Gear Adaptation and Replaced Spark Plug Wire(s)
October 20, 2014 2002 Mercedes-Benz CLK320, 3.2L, V6, Des 112.940, USA *
Flywheel Ring Gear Adaptation
Spark Plug Wire(s)
122,710 miles Reset Flywheel Ring Gear Adaptation and Replaced Spark Plug Wire(s)
February 21, 2014 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Flywheel Ring Gear Adaptation
Spark Plug Wire(s)
73,000 miles Reset Flywheel Ring Gear Adaptation and Replaced Spark Plug Wire(s)
March 28, 2016 2005 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Fuel Injector Wiring
- Rodent chewed wiring
Repaired Fuel Injector Wiring
February 2, 2017 1998 Mercedes-Benz ML320, 3.2L, V6, SOHC, USA *
Fuel Injector Wiring Repaired Fuel Injector Wiring
July 2, 2016 1998 Mercedes-Benz E430, 4.3L, V8, Des 113.940, USA *
Fuel Injector Wiring Repaired Fuel Injector Wiring
May 4, 2015 2003 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Fuel Pump
- vehicle had 20 psi of fuel pressure
Replaced Fuel Pump
March 9, 2020 2001 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Fuel Pump
- low fuel pressure from pump
Replaced Fuel Pump
April 19, 2011 2000 Mercedes-Benz C280, 2.8L, V6, Des 112.920, USA *
Fuel Pump
- replaced fuel pump
Replaced Fuel Pump
January 10, 2011 2004 Mercedes-Benz S430, 4Matic 4.3L, V8, Des 113.948, USA *
Fuel Filter/Regulator Assembly
- Low fuel pressure, replaced fuel filter/pressure regulator assembly. O.K. now
Replaced Fuel Filter/Regulator Assembly
July 29, 2016 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Fuel Filter/Regulator Assembly
147,000 miles Replaced Fuel Filter/Regulator Assembly
October 24, 2015 2004 Mercedes-Benz SL500, 5.0L, V8, MFI, USA
Fuel Injector Cleaner
55,600 miles Performed Fuel Injector Cleaner
June 11, 2016 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Fuel Injector Cleaner Performed Fuel Injector Cleaner
September 15, 2014 2004 Mercedes-Benz S500, 4Matic 5.0L, V8, Des 113.966, USA *
Gasoline
- Fuel was contaminated. Drained and refill with fresh fuel.
116,000 miles Replaced Gasoline
June 8, 2009 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Gasoline
- Found bad gas after removing the sending units at gas thank and inspected. This car had a misfire only on cylinder #8 and gas looked ok at fuel rail.
61,249 miles Flushed Gasoline
May 30, 2012 2001 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Ignition Coil(s)
Spark Plug(s)
- Replaced 2 ignition coils and spark plugs fixed it.
Replaced Ignition Coil(s) and Replaced Spark Plug(s)
March 17, 2016 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Ignition Coil(s)
Spark Plug(s)
155,816 miles Replaced Ignition Coil(s) and Replaced Spark Plug(s)
March 6, 2015 2001 Mercedes-Benz SLK320, 3.2L, V6, MFI, USA *
Intake Manifold Gasket(s)
- po300 smoke machine foud intake leak at intake gasket nstaled new gaskets no further concearn
Replaced Intake Manifold Gasket(s)
June 27, 2018 1999 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Intake Manifold Gasket(s)
- Found intake manifold gasket blown out.
Replaced Intake Manifold Gasket(s)
January 18, 2017 2002 Mercedes-Benz CLK320, 3.2L, V6, Des 112.940, USA *
Brake Booster Vacuum Supply Hose
Mass Air Flow (MAF) Sensor
- Smoke test and replace boots+seals hoses and MAF Sensor. Redo the smoke test booster vacuum hose leaked at the intake replaced and road test.
Replaced Brake Booster Vacuum Supply Hose and Replaced Mass Air Flow (MAF) Sensor
February 20, 2019 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Breather Hose
Fuel Pump
- broken breather hose to throttle valve fuel pressure was 35 psi
Replaced Breather Hose and Replaced Fuel Pump
August 3, 2010 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Catalytic Converter(s)
Crankshaft Position Sensor (CKP) Relearn
- engine was over-heated until it shut down. melted converters replaced converters cleared codes relearned crank angle ran great
Replaced Catalytic Converter(s) and Performed Crankshaft Position Sensor (CKP) Relearn
November 13, 2013 2004 Mercedes-Benz CLK500, 5.0L, V8, MFI, USA *
Catalytic Converter(s)
Spark Plug Wire(s)
- VEHICLE had random misfire both banks moved plugs wires and coils around fixed half the concern with new wires re road test under heavy accel got miss fires for bank 2 only found cat clogged for that bank replaced cat road test good
Replaced Catalytic Converter(s) and Replaced Spark Plug Wire(s)
June 2, 2014 2006 Mercedes-Benz CLK500, 5.0L, V8, Des 113.968, USA *
Combustion Chambers
- Performed top engine clean for carbon build up. Plugs were fouled black with hard carbon.
97,000 miles Cleaned Combustion Chambers
October 13, 2011 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Crankshaft Position (CKP) Sensor
Crankshaft Position Sensor (CKP) Relearn
147,000 miles Replaced Crankshaft Position (CKP) Sensor and Performed Crankshaft Position Sensor (CKP) Relearn
October 10, 2015 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position (CKP) Sensor
- Performed adaptation.
Fuel Adaptation Erase/Relearn
88,882 miles Reset Crankshaft Position (CKP) Sensor and Performed Fuel Adaptation Erase/Relearn
September 19, 2014 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn
Spark Plug(s)
- wrong heat grade of spark plugs were installed, also performed crankshaft position relearn
Performed Crankshaft Position Sensor (CKP) Relearn and Replaced Spark Plug(s)
October 17, 2015 2000 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, SOHC, USA *
EGR Valve Actuator
- found no codes futher diag found egr valve hanging open due to solenoid allowing vacuum replaced solenoid all misfires gone.
Replaced EGR Valve Actuator
October 10, 2011 1998 Mercedes-Benz SLK230, Kompressor 2.3L, L4, MFI, USA *
Electronic Control Unit (ECU)
- Arrived with an obvious misfire (shaking/missing). p0300 p0302 p0303 p0141 p0136. Was missing on cylinder 3. Checked fuel injectors by ear (stethescope) and found #3 did not sound righr. Noid revealed ecm was not firing injector, all ohmed out ok. Checked wiring. Ended up being the computer.
Replaced Electronic Control Unit (ECU)
March 23, 2012 2001 Mercedes-Benz C320, 3.2L, V6, MFI, USA *
Engine
- Engine replaced with used, no compression on #5 cylinder, piston and cylinder damage.
83,000 miles Replaced Engine
October 12, 2011 2006 Mercedes-Benz SL500, 5.0L, V8, Des 113.963, USA *
Engine Carbon
Fuel Injector(s)
- vehicle had rough idle. Put motor vac in gas tank with 1/4 tank full.suspect carbon.
Cleaned Engine Carbon and Cleaned Fuel Injector(s)
October 17, 2015 2003 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Engine Tune Up
- tune-up
Performed Engine Tune Up
July 26, 2016 2004 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Flywheel Ring Gear Adaptation
Fuel Injector(s)
Spark Plug Wire(s)
Spark Plug(s) Reset Flywheel Ring Gear Adaptation and Replaced Fuel Injector(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
August 4, 2010 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Fuel Filter
- replaced fuel filter.
Replaced Fuel Filter
February 23, 2017 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Fuel Filter
Spark Plug Wire(s)
- FUEL FILTER
Replaced Fuel Filter and Replaced Spark Plug Wire(s)
November 9, 2012 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Fuel Injector(s)
Ignition Coil(s)
- #2 Ignition Coil
180,008 miles Replaced Fuel Injector(s) and Replaced Ignition Coil(s)
April 16, 2016 1996 Mercedes-Benz E320, 3.2L, L6, Des 104.995, USA *
Ignition Coil(s)
Powertrain Control Module (PCM)
- we did a mestake to rush & change pcm bu later we found bad ignition coil on 3 & 4 /we change the pcm due to computer cuting off injector pulse on those 2 cilinders
Replaced Ignition Coil(s) and Replaced Powertrain Control Module (PCM)
March 31, 2020 2005 Mercedes-Benz E320, 4Matic 3.2L, V6, Gas, Asp N, Des 112.954, 18V, SOHC, USA *
Ignition Coil(s)
Spark Plug Wire(s)
- #1 Ignition Coil was starting to MELT after several minutes of run time. In addition to having 154,000 mile spark plugs (60k past their interval), and high resistance over half the cables.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s)
June 14, 2011 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Motor Mount(s)
Spark Plug(s)
- plugs motor mount
Replaced Motor Mount(s) and Replaced Spark Plug(s)
April 1, 2020 2001 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, USA *
Spark Plug Boot(s)
132,000 miles Replaced Spark Plug Boot(s)
December 20, 2019 2004 Mercedes-Benz E500, 4Matic 5.0L, V8, Des 113.969, USA *
Tech Tip
- Replaced spark plugs and wires
145,000 miles Information Only Tech Tip
June 9, 2015 2003 Mercedes-Benz C320, 4Matic 3.2L, V6, Des 112.953, USA *
Transmission Fluid Cooler
- THis car had all symptoms of a random misfire but no codes.Tried plugs wires,MAF,crank sensor,fuel pressure good,ignition coils all no help could not duplicate in shop, Found torque converter locking and unlocking racked trans cooler inside radiator replaced unit and flushed twice ops good.
Replaced Transmission Fluid Cooler
Vehicle Application:
2001 C240 2.6
2002 C240 2.6
2003 C240 2.6
2004 C240 2.6
2005 C240 2.6
1999 C280 2.8
2000 C280 2.8
2001 C320 3.2
2002 C320 3.2
2003 C320 3.2
2000 CLK320 3.2
2001 CLK320 3.2
2002 CLK320 3.2
2001 CLK430 4.3
2006 CLK500 5.0
2002 CLK55 AMG 5.5
2006 CLS500 5.0
1998 E320 3.2
1999 E320 3.2
2000 E320 3.2
2001 E320 3.2
2002 E320 3.2
2003 E320 3.2
2004 E320 3.2
2005 E320 3.2
1998 E430 4.3
2003 E500 5.0
2004 E500 5.0
2005 E500 5.0
2006 E500 5.0
2002 G500 5.0
1998 ML320 3.2
1999 ML320 3.2
2000 ML320 3.2
2001 ML320 3.2
2002 ML320 3.2
2005 ML350 3.7
1999 ML430 4.3
2000 ML430 4.3
2001 ML430 4.3
2002 ML500 5.0
2003 ML500 5.0
2006 R500 5.0
2000 S430 4.3
2001 S430 4.3
2002 S430 4.3
2003 S430 4.3
2004 S430 4.3
2004 S500 5.0
1999 SL500 5.0
2000 SL500 5.0
2001 SL500 5.0
2002 SL500 5.0
2003 SL500 5.0
2004 SL500 5.0
2005 SL500 5.0
2006 SL500 5.0
2000 SLK230 2.3
Customer Concern: The engine has a misfire.
Average Reported Mileage: 111842
Tests/Procedures:
1. Identify misfiring cylinder. The scan tool may be incorrect.
2. Reset ring gear adaptations with scan tool. Note: This should be done after each test step.
3. Connect fuel pressure gauge, should have around 58 PSI. Test during road test to verify pressure does not drop under load.
4. If fuel pressure drops after engine is shut off, lift fuel rail and check for leaking fuel injectors at misfiring cylinder.
5. Test fuel for contamination.
6. Inspect wiring harness going to injectors and coils for torn wiring insulation. Pay close attention to wiring resting on valve covers and injector rail.
7. Swap coil and spark plug wires from misfiring cylinder to known good cylinder. Note different length wires as indicated by the letter stamped on them. Ohm out plug wires. Specification is stamped on the wire itself. Most wires ohm out to 2.2 Kohms.
8. Inspect and swap spark plugs, cylinder to cylinder.
9. Smoke test for intake vacuum leaks.
10. Verify EGR valve is not stuck open. Apply vacuum to the valve in order to open it then quickly remove it to snap the valve closed.
11. Perform inspection for issues with the valve train or compression. This includes compression, cylinder leakdown, and running compression. Compare compression reading with known good cylinders to identify low output from a cylinder.
Tech Tips: Resetting of ring gear adaptation with the scan tool is needed to reset the engine computer's memory of misfire adaptations.
Diagnostic Codes
P0300
Confirmed Fix Summary
Confirmed Fix
47 - Replaced Spark Plug Wire(s)
38 - Replaced/Information Only Ignition Coil(s)
15 - Replaced/Cleaned Spark Plug Wire(s) and Replaced Spark Plug(s)
13 - Replaced Catalytic Converter(s)
11 - Replaced Spark Plug(s)
11 - Reset/Relearned/Performed Flywheel Ring Gear Adaptation
10 - Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
8 - Performed Crankshaft Position Sensor (CKP) Relearn
8 - Replaced Mass Air Flow (MAF) Sensor
8 - Replaced/Cleaned Fuel Injector(s)
5 - Replaced Crankshaft Position (CKP) Sensor
3 - Replaced Fuel Pump
3 - Replaced Exhaust Gas Recirculation (EGR) Valve
3 - Repaired Fuel Injector Wiring
3 - Reset Flywheel Ring Gear Adaptation and Replaced Spark Plug Wire(s)
3 - Performed/Replaced Engine Tune Up and Replaced Ignition Coil(s)
2 - Replaced Fuel Filter/Regulator Assembly
2 - Performed Fuel Injector Cleaner
2 - Replaced Ignition Coil(s) and Replaced Spark Plug(s)
2 - Replaced/Flushed Gasoline
2 - Replaced Intake Manifold Gasket(s)
1 - Replaced Engine
1 - Replaced Ignition Coil(s) and Replaced Powertrain Control Module (PCM)
1 - Performed Engine Tune Up
1 - Replaced Fuel Filter
1 - Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s)
1 - Cleaned Combustion Chambers
1 - Replaced Electronic Control Unit (ECU)
1 - Replaced Spark Plug Boot(s)
1 - Replaced Catalytic Converter(s) and Replaced Spark Plug Wire(s)
1 - Replaced Fuel Injector(s) and Replaced Ignition Coil(s)
1 - Reset Crankshaft Position (CKP) Sensor and Performed Fuel Adaptation Erase/Relearn
1 - Replaced Catalytic Converter(s) and Performed Crankshaft Position Sensor (CKP) Relearn
1 - Replaced Motor Mount(s) and Replaced Spark Plug(s)
1 - Replaced EGR Valve Actuator
1 - Replaced Transmission Fluid Cooler
1 - Reset Flywheel Ring Gear Adaptation and Replaced Fuel Injector(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
1 - Replaced Breather Hose and Replaced Fuel Pump
1 - Replaced Brake Booster Vacuum Supply Hose and Replaced Mass Air Flow (MAF) Sensor
1 - Replaced Fuel Filter and Replaced Spark Plug Wire(s)
1 - Replaced Crankshaft Position (CKP) Sensor and Performed Crankshaft Position Sensor (CKP) Relearn
1 - Performed Crankshaft Position Sensor (CKP) Relearn and Replaced Spark Plug(s)
1 - Cleaned Engine Carbon and Cleaned Fuel Injector(s)
Confirmed Fix Details
Tech Reported Fix Details Confirmed Fix
September 24, 2015 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Spark Plug Wire(s)
- fuel injector for #6 would shut off after 60 seconds of engine operation with spark still present. swapped plug wires to cyl #2 and injector shutoff followed wires. Mercedes misfire detection was flagging cyl three, found bad cyl with cancellation test which was cyl 6
Replaced Spark Plug Wire(s)
October 28, 2016 2002 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, USA *
Spark Plug Wire(s)
- There are 12 spark plugs and 12 wires on this 6-cylinder engine. Each wire contains a 2 kilo-ohm resistor. All the wires I measured had "out of limits" resistance. Runs fine now.
Replaced Spark Plug Wire(s)
January 5, 2010 2001 Mercedes-Benz E320, 3.2L, V6, Des 112.941, USA *
Spark Plug Wire(s)
- Had a bad plug wire. Both wires to each cylinder have to be good for the cylinder to fire.
Replaced Spark Plug Wire(s)
August 16, 2015 2003 Mercedes-Benz C320, 4Matic 3.2L, V6, Des 112.953, USA *
Spark Plug Wire(s)
- Wires were burnt inside on spark plug end replace wires and plugs verified repair
Replaced Spark Plug Wire(s)
June 11, 2019 2001 Mercedes-Benz SLK230, Kompressor 2.3L, L4, Des 111.983, USA *
Spark Plug Wire(s)
- p0303/p0304. someone swapped coil wires between number 3 and 4.
Replaced Spark Plug Wire(s)
December 20, 2013 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Spark Plug Wire(s)
- scoped ignition system had bad spark plug wires
Replaced Spark Plug Wire(s)
November 27, 2013 2002 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, USA *
Spark Plug Wire(s)
- valve cover gaskets and spark plug wire set
Replaced Spark Plug Wire(s)
December 5, 2016 2005 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Spark Plug Wire(s)
- Replaced Spark Plug Wire(s)
Replaced Spark Plug Wire(s)
July 27, 2011 2002 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Spark Plug Wire(s)
- SPARK PLUG WIRES
Replaced Spark Plug Wire(s)
10(+) 11-47 Joseph Schulte
June 14, 2014 2001 Mercedes-Benz CLK430, 4.3L, V8, Des 113.943, USA *
Spark Plug Wire(s)
- wire set
Replaced Spark Plug Wire(s)
January 21, 2019 2001 Mercedes-Benz C320, 3.2L, V6, MFI, USA *
Ignition Coil(s)
- Engine had rough idle, no misfire codes and no performance issues on the highway. One leg of coil #5 was firing and not the other, replaced coil and problem is gone. smh
Replaced Ignition Coil(s)
March 21, 2017 2002 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Ignition Coil(s)
- Valve cover vent cover was leaking and oil had saturated coils, wires and leaking into spark plug holes. Replaced coils, valve cover gaskets and re-sealed top cover.
Replaced Ignition Coil(s)
February 25, 2019 1999 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Ignition Coil(s)
- seemed like random misfire. probed coils with ignition probe and modis, found 1 coil with bad pattern. replaced coil, now good.
Replaced Ignition Coil(s)
February 20, 2019 2005 Mercedes-Benz CL500, 5.0L, V8, MFI, USA *
Ignition Coil(s)
- Moved ignition coil to another cylinder and performed power balance test/smooth running test. Misfire followed ign coil.
Replaced Ignition Coil(s)
May 1, 2018 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Ignition Coil(s)
- coil was problem but replaced plugs and wires due to mileage.
Replaced Ignition Coil(s)
October 20, 2011 2005 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Ignition Coil(s)
- FOUND CORROSION ON #5 COIL AND WIRES REPLACE WITH NEW NOW OK
Replaced Ignition Coil(s)
July 26, 2016 2004 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Ignition Coil(s)
- CLYINDER 2 HAD CORRODED TERMINALS ON THE COIL.
Replaced Ignition Coil(s)
July 26, 2012 2001 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Ignition Coil(s)
- Replaced #7 ignition coil
Replaced Ignition Coil(s)
May 18, 2013 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Ignition Coil(s)
- replaced ignition coils
Replaced Ignition Coil(s)
July 4, 2014 2003 Mercedes-Benz ML500, 5.0L, V8, MFI, Bore 3.81In Stroke 3.31In, Bore 97.00mm Stroke 84.00mm, USA *
Ignition Coil(s)
- Faulty ignition coils
Replaced Ignition Coil(s)
March 13, 2012 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
- Intermittant misfire. Replace valve cover gaskets, spark plugs. Cleaned ignition cables. Replaced left and right catalytic converter pipe assemblies(exhaust restriction causing oil leaks due to crankcase pressure build-up)Done deal
Cleaned Spark Plug Wire(s) and Replaced Spark Plug(s)
March 13, 2018 1999 Mercedes-Benz SLK230, Kompressor 2.3L, L4, Des 111.973, USA *
Spark Plug Wire(s)
Spark Plug(s)
- Replaced Spark Plug Wire(s) and Replaced Spark Plug(s) -wire is broken (tech Jasmin)
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
July 7, 2013 2000 Mercedes-Benz C280, 2.8L, V6, Des 112.920, USA *
Spark Plug Wire(s)
Spark Plug(s)
- plugs and wires wires were bad and plugs were fouled
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
November 16, 2010 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
- replace spark plugs and wires that fix it
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
October 19, 2010 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
- replace plugs and wires and that was it
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
January 19, 2011 2002 Mercedes-Benz ML500, 5.0L, V8, MFI, Bore 3.82In Stroke 3.31In, Bore 97.0mm Stroke 84.0mm, USA *
Spark Plug Wire(s)
Spark Plug(s)
- spark plugs and spark plug wires
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
November 8, 2010 2000 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
- replace plugs and wires
Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
August 23, 2016 2003 Mercedes-Benz SL500, 5.0L, V8, MFI, USA *
Spark Plug Wire(s)
Spark Plug(s)
36,000 miles Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
March 26, 2016 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Spark Plug Wire(s)
Spark Plug(s)
55,000 miles Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
May 28, 2014 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Spark Plug Wire(s)
Spark Plug(s)
126,139 miles Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
March 25, 2018 2004 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Catalytic Converter(s)
- Test Drive the vehicle to listen for sounds from the bottom of the vehicle. If you hear noises inspect catalytic convertors. All the (four) mis-fire codes were from the left bank. We moved all the coils and plugs to the right side bank and the misfires did not move. Changed out the Left Side cat.
Replaced Catalytic Converter(s)
May 13, 2015 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Catalytic Converter(s)
- Had no power when you pressed the accelerator and Had all misfires on the left bank only, P2050 Multiple misfire, P2054 #6 misfire, P2056 #5 misfire, P2052 #4 misfire, left bank converter was restricted, replaced both
Replaced Catalytic Converter(s)
March 14, 2018 2003 Mercedes-Benz E320, 3.2L, V6, Des 112.941, USA *
Catalytic Converter(s)
- Right bank catalytic converter fell apart on the inside and would cause a restriction in the pipe causing right bank of cylinders to mis fire.
Replaced Catalytic Converter(s)
August 10, 2015 1999 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Catalytic Converter(s)
- DID A BACKP RESSURE TEST ON EXHAUST SYSTEM PRE AND POST CATALYST, HAD 15 PSI BACK PRESSURE BEFORE CATS AND ONLY 2 PSI AFTER
Replaced Catalytic Converter(s)
July 21, 2015 2002 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Catalytic Converter(s)
- Check back pressure, disconnect exhaust pipe,replace front catalytic converter,road test OK
Replaced Catalytic Converter(s)
April 4, 2018 2003 Mercedes-Benz SL500, 5.0L, V8, MFI, USA *
Catalytic Converter(s)
- Bank 2 O2 sensor failed lean, both bank 2 cat. converters plugged up from excessive fuel.
Replaced Catalytic Converter(s)
April 20, 2016 2001 Mercedes-Benz C320, 3.2L, V6, MFI, USA *
Catalytic Converter(s)
- Misfire on #1 and #3 only. Found secondary catalytic converter came apart.
Replaced Catalytic Converter(s)
June 7, 2011 2003 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Catalytic Converter(s)
- Left side cat loose and plugged, refer to dealer for cat replacment
Replaced Catalytic Converter(s)
April 5, 2012 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Catalytic Converter(s)
- passenger side cat's restricted flow when engine warmed up
Replaced Catalytic Converter(s)
April 26, 2011 2000 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Catalytic Converter(s)
- replace cat.converters misfires were gone
Replaced Catalytic Converter(s)
December 11, 2018 2001 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Flywheel Ring Gear Adaptation Reset Flywheel Ring Gear Adaptation
June 27, 2018 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Flywheel Ring Gear Adaptation
- Sent to dealer to have the adaptations reset.
13,000 miles Relearned Flywheel Ring Gear Adaptation
July 27, 2017 2003 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Flywheel Ring Gear Adaptation
225,240 miles Performed Flywheel Ring Gear Adaptation
May 1, 2016 2006 Mercedes-Benz CLS500, 5.0L, V8, MFI, USA *
Flywheel Ring Gear Adaptation Reset Flywheel Ring Gear Adaptation
March 26, 2016 1998 Mercedes-Benz E430, 4.3L, V8, Des 113.940, USA *
Flywheel Ring Gear Adaptation
- This repaired the misfire after the tune up was performed.
121,000 miles Reset Flywheel Ring Gear Adaptation
October 21, 2015 2000 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Flywheel Ring Gear Adaptation
109,059 miles Reset Flywheel Ring Gear Adaptation
May 26, 2015 2004 Mercedes-Benz E320, 3.2L, V6, Des 112.949, USA *
Flywheel Ring Gear Adaptation
145,000 miles Reset Flywheel Ring Gear Adaptation
June 5, 2014 2003 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Flywheel Ring Gear Adaptation
161,988 miles Reset Flywheel Ring Gear Adaptation
February 8, 2012 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Flywheel Ring Gear Adaptation
43,051 miles Reset Flywheel Ring Gear Adaptation
September 22, 2010 1999 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Flywheel Ring Gear Adaptation
- Sent to dealer to reset. Had previous catalytic converter damage.
161,000 miles Reset Flywheel Ring Gear Adaptation
June 29, 2015 2006 Mercedes-Benz ML500, 5.0L, V8, MFI, USA *
Spark Plug(s)
- monitored scan tool data for misfire on cyl 7
Replaced Spark Plug(s)
February 18, 2019 2000 Mercedes-Benz SLK230, Kompressor 2.3L, L4, Des 111.973, USA *
Spark Plug(s)
- replaced spark plugs
Replaced Spark Plug(s)
March 1, 2013 1999 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Spark Plug(s)
- tune up
Replaced Spark Plug(s)
July 15, 2019 2001 Mercedes-Benz SLK230, Kompressor 2.3L, L4, Des 111.983, USA *
Spark Plug(s) Replaced Spark Plug(s)
December 6, 2018 2004 Mercedes-Benz E320, 3.2L, V6, Des 112.949, USA *
Spark Plug(s) Replaced Spark Plug(s)
June 27, 2018 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Spark Plug(s)
- Performed tune up and engine ran much better.
92,000 miles Replaced Spark Plug(s)
April 15, 2018 2003 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Spark Plug(s) Replaced Spark Plug(s)
April 6, 2016 2003 Mercedes-Benz E320, 3.2L, V6, Des 112.941, USA *
Spark Plug(s) Replaced Spark Plug(s)
March 13, 2015 1999 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Spark Plug(s) Replaced Spark Plug(s)
10(+) 11-11 Eddie Lakkis
October 22, 2014 2001 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Spark Plug(s) Replaced Spark Plug(s)
July 17, 2014 2000 Mercedes-Benz C280, 2.8L, V6, Des 112.920, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- Could not identify mifiring cylinder. started to perform ignition tune- up. tested ignition coils output. found 2 ignition coils bad- only producing spark out of 1 terminal. replaced 2 coils, plugs , & wires. car runs great now.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
February 17, 2016 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- P0300, P0301. Carbon tracking on cyl 1 spark plug and wire. Ignition misfire present on scope patterns of 3 & 4 also.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
August 10, 2015 2005 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- found plugs fouled also burning oil. replaced plugs,wires and coils.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
July 25, 2016 2000 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- Replace#5 ignition coil, all spark plugs and wires.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
May 2, 2018 2005 Mercedes-Benz ML350, 3.7L, V6, MFI, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- 1 coil, plugs and wires
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
March 24, 2020 2006 Mercedes-Benz ML500, 5.0L, V8, MFI, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
- pull plugs
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
October 17, 2016 2004 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s)
189,423 miles Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
October 7, 2015 2002 Mercedes-Benz G500, 5.0L, V8, MFI, USA *
Ignition Coil(s)
Spark Plug Wire(s)
Spark Plug(s) Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
9 CJ Bailey
September 27, 2011 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Ignition Coil(s)
- #2 Ignition Coil
Spark Plug Wire(s)
Spark Plug(s)
70,000 miles Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
10 Carey Elliott
September 30, 2010 2002 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, USA *
Ignition Coil(s)
- #5 Ignition Coil
Spark Plug Wire(s)
Spark Plug(s)
89,606 miles Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
August 3, 2016 2003 Mercedes-Benz E320, 3.2L, V6, Des 112.949, USA *
Crankshaft Position Sensor (CKP) Relearn
- Performed Crankshaft Position Sensor (CKP) Relearn
Performed Crankshaft Position Sensor (CKP) Relearn
April 9, 2018 2003 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn Performed Crankshaft Position Sensor (CKP) Relearn
June 24, 2014 2000 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Crankshaft Position Sensor (CKP) Relearn
121,180 miles Performed Crankshaft Position Sensor (CKP) Relearn
May 27, 2014 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Crankshaft Position Sensor (CKP) Relearn
59,222 miles Performed Crankshaft Position Sensor (CKP) Relearn
February 20, 2014 1999 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Crankshaft Position Sensor (CKP) Relearn
195,613 miles Performed Crankshaft Position Sensor (CKP) Relearn
April 10, 2013 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn
39,714 miles Performed Crankshaft Position Sensor (CKP) Relearn
September 20, 2012 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn
43,000 miles Performed Crankshaft Position Sensor (CKP) Relearn
June 1, 2011 2004 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn
87,000 miles Performed Crankshaft Position Sensor (CKP) Relearn
May 11, 2015 2005 Mercedes-Benz ML350, 3.7L, V6, MFI, USA *
Fuel Injector(s)
- Number four injector had 7 ohms, it was drawing current from number 5 and 6 which had 16 ohms, replaced number four injector smooth running values of 5 and 6 went normal, car runs smooth!
Replaced Fuel Injector(s)
February 20, 2015 2003 Mercedes-Benz SLK320, 3.2L, V6, MFI, USA *
Fuel Injector(s)
- #4 injector inop when cold - replaced
Replaced Fuel Injector(s)
November 7, 2013 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Fuel Injector(s)
- Replace injector with OE unit.
Replaced Fuel Injector(s)
June 18, 2013 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Fuel Injector(s)
- injector cylinder 3
Replaced Fuel Injector(s)
February 24, 2019 2004 Mercedes-Benz ML500, 5.0L, V8, MFI, Bore 3.81In Stroke 3.31In, Bore 97.00mm Stroke 84.00mm, USA *
Fuel Injector(s) Replaced Fuel Injector(s)
February 17, 2019 2006 Mercedes-Benz SL500, 5.0L, V8, Des 113.963, USA *
Fuel Injector(s) Cleaned Fuel Injector(s)
March 3, 2016 1998 Mercedes-Benz ML320, 3.2L, V6, SOHC, USA *
Fuel Injector(s)
- Had two injectors that were stuck open.
Fuel Injector(s)
- Had two injectors that were stuck open.
Replaced Fuel Injector(s)
May 13, 2013 2005 Mercedes-Benz E320, 4Matic 3.2L, V6, Gas, Asp N, Des 112.954, 18V, SOHC, USA *
Fuel Injector(s)
147,000 miles Replaced Fuel Injector(s)
August 30, 2016 2000 Mercedes-Benz E320, 3.2L, V6, Des 112.941, SOHC, USA *
Mass Air Flow (MAF) Sensor
- only on full throttle would shut injectors off cause missfire 1 bank 456 shut car off restart would be fine till full throttle
Replaced Mass Air Flow (MAF) Sensor
June 6, 2013 2006 Mercedes-Benz CLS500, 5.0L, V8, MFI, USA *
Mass Air Flow (MAF) Sensor
- hesitation,p0101 and p0102, faulty maf sensor, replaced and cleared codes.
Replaced Mass Air Flow (MAF) Sensor
December 8, 2010 2003 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Mass Air Flow (MAF) Sensor
- mass air sensor
Replaced Mass Air Flow (MAF) Sensor
December 8, 2010 2003 Mercedes-Benz C320, 4Matic 3.2L, V6, Des 112.953, USA *
Mass Air Flow (MAF) Sensor
- mass air sensor
Replaced Mass Air Flow (MAF) Sensor
July 15, 2017 2005 Mercedes-Benz SL500, 5.0L, V8, MFI, USA *
Mass Air Flow (MAF) Sensor
- Replaced Mass air flow sensor, cleared codes and reset Adaptations
Replaced Mass Air Flow (MAF) Sensor
September 29, 2015 2000 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Mass Air Flow (MAF) Sensor Replaced Mass Air Flow (MAF) Sensor
May 6, 2015 2000 Mercedes-Benz C280, 2.8L, V6, Des 112.920, USA *
Mass Air Flow (MAF) Sensor Replaced Mass Air Flow (MAF) Sensor
August 1, 2011 1999 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Mass Air Flow (MAF) Sensor
113,000 miles Replaced Mass Air Flow (MAF) Sensor
July 9, 2015 2002 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Crankshaft Position (CKP) Sensor
- Vehicle had intermittent miss fire and finally engine just stalled with no codes set / let cool down and engine started right up / replaced crank sensor and car has been running fine for over 3 weeks
Replaced Crankshaft Position (CKP) Sensor
October 20, 2011 2006 Mercedes-Benz CLS500, 5.0L, V8, MFI, USA *
Crankshaft Position (CKP) Sensor
- Changed the crankshaft position sensor
Replaced Crankshaft Position (CKP) Sensor
May 18, 2012 2006 Mercedes-Benz CLS500, 5.0L, V8, MFI, USA *
Crankshaft Position (CKP) Sensor
- crankshaft position sensor
Replaced Crankshaft Position (CKP) Sensor
October 24, 2016 2005 Mercedes-Benz E320, 4Matic 3.2L, V6, Gas, Asp N, Des 112.954, 18V, SOHC, USA *
Crankshaft Position (CKP) Sensor Replaced Crankshaft Position (CKP) Sensor
December 29, 2015 1999 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Crankshaft Position (CKP) Sensor
100,000 miles Replaced Crankshaft Position (CKP) Sensor
October 24, 2015 2004 Mercedes-Benz SL500, 5.0L, V8, MFI, USA
Engine Tune Up
Ignition Coil(s)
- major tune up with coils
Replaced Engine Tune Up and Replaced Ignition Coil(s)
October 10, 2015 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Engine Tune Up
Ignition Coil(s)
- full tune with coil for bad cylander
Performed Engine Tune Up and Replaced Ignition Coil(s)
November 8, 2015 2006 Mercedes-Benz SL500, 5.0L, V8, Des 113.963, USA *
Engine Tune Up
Ignition Coil(s)
- major tune with 3 coils
Performed Engine Tune Up and Replaced Ignition Coil(s)
April 22, 2014 2001 Mercedes-Benz SL500, 5.0L, V8, Des 113.961, USA *
Exhaust Gas Recirculation (EGR) Valve
- lack of power and enigine misses at idle Secondary ignition components good No codes fuel pressure and quality good Low engine vacuum When disabling injectors each one on left bank made a diference Nothing on the right side. Exahust back pressureok. Faulty EGR stuck open. Confirmed fix
Replaced Exhaust Gas Recirculation (EGR) Valve
May 20, 2015 2004 Mercedes-Benz S500, 5.0L, V8, Des 113.960, USA *
Exhaust Gas Recirculation (EGR) Valve
- it was missing on all cyls and popping back into the intake ,unplugged the vac line and the engine smoothed out
Replaced Exhaust Gas Recirculation (EGR) Valve
April 24, 2013 2005 Mercedes-Benz ML350, 3.7L, V6, MFI, USA *
Exhaust Gas Recirculation (EGR) Valve
119,981 miles Replaced Exhaust Gas Recirculation (EGR) Valve
March 26, 2016 2001 Mercedes-Benz E320, 3.2L, V6, Des 112.941, USA *
Flywheel Ring Gear Adaptation
Spark Plug Wire(s)
134,624 miles Reset Flywheel Ring Gear Adaptation and Replaced Spark Plug Wire(s)
October 20, 2014 2002 Mercedes-Benz CLK320, 3.2L, V6, Des 112.940, USA *
Flywheel Ring Gear Adaptation
Spark Plug Wire(s)
122,710 miles Reset Flywheel Ring Gear Adaptation and Replaced Spark Plug Wire(s)
February 21, 2014 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Flywheel Ring Gear Adaptation
Spark Plug Wire(s)
73,000 miles Reset Flywheel Ring Gear Adaptation and Replaced Spark Plug Wire(s)
March 28, 2016 2005 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Fuel Injector Wiring
- Rodent chewed wiring
Repaired Fuel Injector Wiring
February 2, 2017 1998 Mercedes-Benz ML320, 3.2L, V6, SOHC, USA *
Fuel Injector Wiring Repaired Fuel Injector Wiring
July 2, 2016 1998 Mercedes-Benz E430, 4.3L, V8, Des 113.940, USA *
Fuel Injector Wiring Repaired Fuel Injector Wiring
May 4, 2015 2003 Mercedes-Benz C240, 4Matic 2.6L, V6, Des 112.916, USA *
Fuel Pump
- vehicle had 20 psi of fuel pressure
Replaced Fuel Pump
March 9, 2020 2001 Mercedes-Benz ML430, 4.3L, V8, Des 113.942, USA *
Fuel Pump
- low fuel pressure from pump
Replaced Fuel Pump
April 19, 2011 2000 Mercedes-Benz C280, 2.8L, V6, Des 112.920, USA *
Fuel Pump
- replaced fuel pump
Replaced Fuel Pump
January 10, 2011 2004 Mercedes-Benz S430, 4Matic 4.3L, V8, Des 113.948, USA *
Fuel Filter/Regulator Assembly
- Low fuel pressure, replaced fuel filter/pressure regulator assembly. O.K. now
Replaced Fuel Filter/Regulator Assembly
July 29, 2016 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Fuel Filter/Regulator Assembly
147,000 miles Replaced Fuel Filter/Regulator Assembly
October 24, 2015 2004 Mercedes-Benz SL500, 5.0L, V8, MFI, USA
Fuel Injector Cleaner
55,600 miles Performed Fuel Injector Cleaner
June 11, 2016 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Fuel Injector Cleaner Performed Fuel Injector Cleaner
September 15, 2014 2004 Mercedes-Benz S500, 4Matic 5.0L, V8, Des 113.966, USA *
Gasoline
- Fuel was contaminated. Drained and refill with fresh fuel.
116,000 miles Replaced Gasoline
June 8, 2009 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Gasoline
- Found bad gas after removing the sending units at gas thank and inspected. This car had a misfire only on cylinder #8 and gas looked ok at fuel rail.
61,249 miles Flushed Gasoline
May 30, 2012 2001 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Ignition Coil(s)
Spark Plug(s)
- Replaced 2 ignition coils and spark plugs fixed it.
Replaced Ignition Coil(s) and Replaced Spark Plug(s)
March 17, 2016 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Ignition Coil(s)
Spark Plug(s)
155,816 miles Replaced Ignition Coil(s) and Replaced Spark Plug(s)
March 6, 2015 2001 Mercedes-Benz SLK320, 3.2L, V6, MFI, USA *
Intake Manifold Gasket(s)
- po300 smoke machine foud intake leak at intake gasket nstaled new gaskets no further concearn
Replaced Intake Manifold Gasket(s)
June 27, 2018 1999 Mercedes-Benz ML320, 3.2L, V6, Des 112.942, SOHC, USA *
Intake Manifold Gasket(s)
- Found intake manifold gasket blown out.
Replaced Intake Manifold Gasket(s)
January 18, 2017 2002 Mercedes-Benz CLK320, 3.2L, V6, Des 112.940, USA *
Brake Booster Vacuum Supply Hose
Mass Air Flow (MAF) Sensor
- Smoke test and replace boots+seals hoses and MAF Sensor. Redo the smoke test booster vacuum hose leaked at the intake replaced and road test.
Replaced Brake Booster Vacuum Supply Hose and Replaced Mass Air Flow (MAF) Sensor
February 20, 2019 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Breather Hose
Fuel Pump
- broken breather hose to throttle valve fuel pressure was 35 psi
Replaced Breather Hose and Replaced Fuel Pump
August 3, 2010 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Catalytic Converter(s)
Crankshaft Position Sensor (CKP) Relearn
- engine was over-heated until it shut down. melted converters replaced converters cleared codes relearned crank angle ran great
Replaced Catalytic Converter(s) and Performed Crankshaft Position Sensor (CKP) Relearn
November 13, 2013 2004 Mercedes-Benz CLK500, 5.0L, V8, MFI, USA *
Catalytic Converter(s)
Spark Plug Wire(s)
- VEHICLE had random misfire both banks moved plugs wires and coils around fixed half the concern with new wires re road test under heavy accel got miss fires for bank 2 only found cat clogged for that bank replaced cat road test good
Replaced Catalytic Converter(s) and Replaced Spark Plug Wire(s)
June 2, 2014 2006 Mercedes-Benz CLK500, 5.0L, V8, Des 113.968, USA *
Combustion Chambers
- Performed top engine clean for carbon build up. Plugs were fouled black with hard carbon.
97,000 miles Cleaned Combustion Chambers
October 13, 2011 2001 Mercedes-Benz C240, 2.6L, V6, MFI, USA *
Crankshaft Position (CKP) Sensor
Crankshaft Position Sensor (CKP) Relearn
147,000 miles Replaced Crankshaft Position (CKP) Sensor and Performed Crankshaft Position Sensor (CKP) Relearn
October 10, 2015 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position (CKP) Sensor
- Performed adaptation.
Fuel Adaptation Erase/Relearn
88,882 miles Reset Crankshaft Position (CKP) Sensor and Performed Fuel Adaptation Erase/Relearn
September 19, 2014 2002 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Crankshaft Position Sensor (CKP) Relearn
Spark Plug(s)
- wrong heat grade of spark plugs were installed, also performed crankshaft position relearn
Performed Crankshaft Position Sensor (CKP) Relearn and Replaced Spark Plug(s)
October 17, 2015 2000 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, SOHC, USA *
EGR Valve Actuator
- found no codes futher diag found egr valve hanging open due to solenoid allowing vacuum replaced solenoid all misfires gone.
Replaced EGR Valve Actuator
October 10, 2011 1998 Mercedes-Benz SLK230, Kompressor 2.3L, L4, MFI, USA *
Electronic Control Unit (ECU)
- Arrived with an obvious misfire (shaking/missing). p0300 p0302 p0303 p0141 p0136. Was missing on cylinder 3. Checked fuel injectors by ear (stethescope) and found #3 did not sound righr. Noid revealed ecm was not firing injector, all ohmed out ok. Checked wiring. Ended up being the computer.
Replaced Electronic Control Unit (ECU)
March 23, 2012 2001 Mercedes-Benz C320, 3.2L, V6, MFI, USA *
Engine
- Engine replaced with used, no compression on #5 cylinder, piston and cylinder damage.
83,000 miles Replaced Engine
October 12, 2011 2006 Mercedes-Benz SL500, 5.0L, V8, Des 113.963, USA *
Engine Carbon
Fuel Injector(s)
- vehicle had rough idle. Put motor vac in gas tank with 1/4 tank full.suspect carbon.
Cleaned Engine Carbon and Cleaned Fuel Injector(s)
October 17, 2015 2003 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Engine Tune Up
- tune-up
Performed Engine Tune Up
July 26, 2016 2004 Mercedes-Benz C240, 2.6L, V6, Des 112.912, USA *
Flywheel Ring Gear Adaptation
Fuel Injector(s)
Spark Plug Wire(s)
Spark Plug(s) Reset Flywheel Ring Gear Adaptation and Replaced Fuel Injector(s) and Replaced Spark Plug Wire(s) and Replaced Spark Plug(s)
August 4, 2010 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Fuel Filter
- replaced fuel filter.
Replaced Fuel Filter
February 23, 2017 2002 Mercedes-Benz C320, 3.2L, V6, Des 112.946, USA *
Fuel Filter
Spark Plug Wire(s)
- FUEL FILTER
Replaced Fuel Filter and Replaced Spark Plug Wire(s)
November 9, 2012 2002 Mercedes-Benz S430, 4.3L, V8, MFI, USA *
Fuel Injector(s)
Ignition Coil(s)
- #2 Ignition Coil
180,008 miles Replaced Fuel Injector(s) and Replaced Ignition Coil(s)
April 16, 2016 1996 Mercedes-Benz E320, 3.2L, L6, Des 104.995, USA *
Ignition Coil(s)
Powertrain Control Module (PCM)
- we did a mestake to rush & change pcm bu later we found bad ignition coil on 3 & 4 /we change the pcm due to computer cuting off injector pulse on those 2 cilinders
Replaced Ignition Coil(s) and Replaced Powertrain Control Module (PCM)
March 31, 2020 2005 Mercedes-Benz E320, 4Matic 3.2L, V6, Gas, Asp N, Des 112.954, 18V, SOHC, USA *
Ignition Coil(s)
Spark Plug Wire(s)
- #1 Ignition Coil was starting to MELT after several minutes of run time. In addition to having 154,000 mile spark plugs (60k past their interval), and high resistance over half the cables.
Replaced Ignition Coil(s) and Replaced Spark Plug Wire(s)
June 14, 2011 2003 Mercedes-Benz E500, 5.0L, V8, MFI, USA *
Motor Mount(s)
Spark Plug(s)
- plugs motor mount
Replaced Motor Mount(s) and Replaced Spark Plug(s)
April 1, 2020 2001 Mercedes-Benz E320, 4Matic 3.2L, V6, Des 112.941, USA *
Spark Plug Boot(s)
132,000 miles Replaced Spark Plug Boot(s)
December 20, 2019 2004 Mercedes-Benz E500, 4Matic 5.0L, V8, Des 113.969, USA *
Tech Tip
- Replaced spark plugs and wires
145,000 miles Information Only Tech Tip
June 9, 2015 2003 Mercedes-Benz C320, 4Matic 3.2L, V6, Des 112.953, USA *
Transmission Fluid Cooler
- THis car had all symptoms of a random misfire but no codes.Tried plugs wires,MAF,crank sensor,fuel pressure good,ignition coils all no help could not duplicate in shop, Found torque converter locking and unlocking racked trans cooler inside radiator replaced unit and flushed twice ops good.
Replaced Transmission Fluid Cooler
Vehicle Application:
2001 C240 2.6
2002 C240 2.6
2003 C240 2.6
2004 C240 2.6
2005 C240 2.6
1999 C280 2.8
2000 C280 2.8
2001 C320 3.2
2002 C320 3.2
2003 C320 3.2
2000 CLK320 3.2
2001 CLK320 3.2
2002 CLK320 3.2
2001 CLK430 4.3
2006 CLK500 5.0
2002 CLK55 AMG 5.5
2006 CLS500 5.0
1998 E320 3.2
1999 E320 3.2
2000 E320 3.2
2001 E320 3.2
2002 E320 3.2
2003 E320 3.2
2004 E320 3.2
2005 E320 3.2
1998 E430 4.3
2003 E500 5.0
2004 E500 5.0
2005 E500 5.0
2006 E500 5.0
2002 G500 5.0
1998 ML320 3.2
1999 ML320 3.2
2000 ML320 3.2
2001 ML320 3.2
2002 ML320 3.2
2005 ML350 3.7
1999 ML430 4.3
2000 ML430 4.3
2001 ML430 4.3
2002 ML500 5.0
2003 ML500 5.0
2006 R500 5.0
2000 S430 4.3
2001 S430 4.3
2002 S430 4.3
2003 S430 4.3
2004 S430 4.3
2004 S500 5.0
1999 SL500 5.0
2000 SL500 5.0
2001 SL500 5.0
2002 SL500 5.0
2003 SL500 5.0
2004 SL500 5.0
2005 SL500 5.0
2006 SL500 5.0
2000 SLK230 2.3
Last edited by pmercury; 05-19-2020 at 04:35 AM.
