Engine Issues
Thread Starter
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Joined: Jul 2009
Posts: 134
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2007 s550
Engine Issues
The engine is very rough when starting up and has low power when accelerating.
After start up the engine light flashes five times and then stays on.
The codes that show up are: P0335, P0444, P0300, PO307 and P0308.
I changed the spark plugs and crank shaft sensor to no avail. I previously changed out the charcoal gas filter.
Thoughts?
Thank you.
After start up the engine light flashes five times and then stays on.
The codes that show up are: P0335, P0444, P0300, PO307 and P0308.
I changed the spark plugs and crank shaft sensor to no avail. I previously changed out the charcoal gas filter.
Thoughts?
Thank you.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
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From: North Scottsdale, AZ
'71 Pinto
0703 P0335 B70 (Crankshaft Hall sensor): Check wiring of signal line and voltage. (P0335)
0851 P0444 Y58/1 (Purge control valve): Open circuit / Switchover valve permanently closed (P0444)
0629 P0300 Misfiring (P0300)
0630 P0300 Misfiring (P0300)
0632 P0300 Misfiring (P0300)
0657 P0307 Misfiring of cylinder 7: Damages TWC (P0307)
0658 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values (P0307)
0660 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values after engine start (P0307)
0661 P0308 Misfiring of cylinder 8: Damages TWC (P0308)
0662 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values (P0308)
0664 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values after engine start (P0308)
Next step, swap coil packs to different cylinders if fault code follows, replace affected coil packs. If not and engine # is within range, perform compression test “may” be cylinder head. See bulletin here: https://mbworld.org/forums/cls-coupe...ml#post6857762
0851 P0444 Y58/1 (Purge control valve): Open circuit / Switchover valve permanently closed (P0444)
0629 P0300 Misfiring (P0300)
0630 P0300 Misfiring (P0300)
0632 P0300 Misfiring (P0300)
0657 P0307 Misfiring of cylinder 7: Damages TWC (P0307)
0658 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values (P0307)
0660 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values after engine start (P0307)
0661 P0308 Misfiring of cylinder 8: Damages TWC (P0308)
0662 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values (P0308)
0664 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values after engine start (P0308)
Next step, swap coil packs to different cylinders if fault code follows, replace affected coil packs. If not and engine # is within range, perform compression test “may” be cylinder head. See bulletin here: https://mbworld.org/forums/cls-coupe...ml#post6857762
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
273 5.5 engines produced up to 11/09, clean point 30 342934. No recall or service campaign, bulletin so no coverage out of warranty. If vehicle is regularly serviced by MB dealer, MBUSA may offer goodwill assistance towards repair “if” this is your problem. Follow link in previous post to save bulletin.
Removal: http://workshop-manuals.com/mercedes...and_operation/ + next pages
Removal: http://workshop-manuals.com/mercedes...and_operation/ + next pages
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Thread Starter
Member
Joined: Jul 2009
Posts: 134
Likes: 1
2007 s550
0703 P0335 B70 (Crankshaft Hall sensor): Check wiring of signal line and voltage. (P0335)
0851 P0444 Y58/1 (Purge control valve): Open circuit / Switchover valve permanently closed (P0444)
0629 P0300 Misfiring (P0300)
0630 P0300 Misfiring (P0300)
0632 P0300 Misfiring (P0300)
0657 P0307 Misfiring of cylinder 7: Damages TWC (P0307)
0658 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values (P0307)
0660 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values after engine start (P0307)
0661 P0308 Misfiring of cylinder 8: Damages TWC (P0308)
0662 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values (P0308)
0664 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values after engine start (P0308)
Next step, swap coil packs to different cylinders if fault code follows, replace affected coil packs. If not and engine # is within range, perform compression test “may” be cylinder head. See bulletin here: https://mbworld.org/forums/cls-coupe...ml#post6857762
0851 P0444 Y58/1 (Purge control valve): Open circuit / Switchover valve permanently closed (P0444)
0629 P0300 Misfiring (P0300)
0630 P0300 Misfiring (P0300)
0632 P0300 Misfiring (P0300)
0657 P0307 Misfiring of cylinder 7: Damages TWC (P0307)
0658 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values (P0307)
0660 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values after engine start (P0307)
0661 P0308 Misfiring of cylinder 8: Damages TWC (P0308)
0662 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values (P0308)
0664 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values after engine start (P0308)
Next step, swap coil packs to different cylinders if fault code follows, replace affected coil packs. If not and engine # is within range, perform compression test “may” be cylinder head. See bulletin here: https://mbworld.org/forums/cls-coupe...ml#post6857762
Which cylinders are 7 and 8?
If I switch the coil packs would the new codes be P0306 and P0307 (just and example) -- thereby concluding it's the cool pack?
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
In your case you do not need the firing order but rather cylinder layout, see capture (shown in link previously provided).
Last edited by konigstiger; Jul 26, 2016 at 02:30 PM.
Thread Starter
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Joined: Jul 2009
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2007 s550
I replaced coils 7 and 8. After 10 seconds the engine light flashes and then begins to pound. Sounds like it's sucking in air.
Appears to be heavy on oil as well.
Anything else to try?
Thanks
Appears to be heavy on oil as well.
Anything else to try?
Thanks
Thread Starter
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Joined: Jul 2009
Posts: 134
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2007 s550
Thank you for the post. I viewed the provide picture and it shows that cylinder 7 and 8 are the last two on the drivers side. However your statement "Firing order driver side 1/3/5/7, passenger 2/4/6/8" implies cylinder 7 is on the driver side and cylinder 8 is on the passenger side -- which would indicate the drawing is inaccurate.
Please clarify. Thank you in advance.
Thread Starter
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Joined: Jul 2009
Posts: 134
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2007 s550
Aww man; thought I had something.
Just bought a code reader and going to analyze the codes and see what the difference I post install. Will post results.
I also purchased the MB Wisa/Aria and EPC diagnostic tool.
If all else fails will check compression and cylinder heads.
Just bought a code reader and going to analyze the codes and see what the difference I post install. Will post results.
I also purchased the MB Wisa/Aria and EPC diagnostic tool.
If all else fails will check compression and cylinder heads.
Thread Starter
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Joined: Jul 2009
Posts: 134
Likes: 1
2007 s550
UPDATE:
The code reader came. I replaced cylinder 7 and 8 coils and spark plugs which cleared PO300 and PO307.
The only code that remains is PO308.
I switched wires from 7 cylinder to 8 and 8 still misfires.
Are there any other things that I cam do our test before I go to the compression test?
Thank you.
The code reader came. I replaced cylinder 7 and 8 coils and spark plugs which cleared PO300 and PO307.
The only code that remains is PO308.
I switched wires from 7 cylinder to 8 and 8 still misfires.
Are there any other things that I cam do our test before I go to the compression test?
Thank you.
Member
Joined: Dec 2015
Posts: 192
Likes: 41
2007 S600
What do you mean you switched wires? When you switch them to the plug/coil pack you are really screwing up the firing order.
Guess swap injector 8 with 7 and see if misfire follows to answer your question on the injector.
Guess swap injector 8 with 7 and see if misfire follows to answer your question on the injector.
Last edited by kn51; Aug 1, 2016 at 06:15 PM.
Thread Starter
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Joined: Jul 2009
Posts: 134
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2007 s550
The 2007 S550 is plagued with engineering and material defects. Whenever I fix one problem another occurs.
I'm going to fix it and sell it. G class is on the radar.
MBWorld Fanatic!
Joined: Dec 2004
Posts: 4,268
Likes: 253
ugh. be careful what you wish for. the g class has some very serious drivetrain issues on its own. it is a fairly simple vehicle to fix, but it is very expensive parts-wise.
