Noise on start up




a $150 Launch DIY scanner may be
a $2000 Launch PRO scanner...
More coverage more functions. DIY I think has limits in module programming.

The complexity of factory tool requires a lot of learning/training to accomplish basic steps.
There are 2 issues for Power system:
2.The actuation of the valve of the oil pump in the combustion engine has an electrical fault or open circuit. P06DA00
2.Communication with control unit ''Suspension'' has a malfunction. U013200
3.The starter battery has excessive resistance. B1F4500
4.Communication with the battery sensor has a malfunction.The message is missing. U113E87
5.There is an internal fault in the instrument cluster.There is an internal component fault. B221396
6.Front LF antenna ''KEYLESS-GO'' has a malfunction.There is an open circuit. B1A5013
Last edited by Darrington; Aug 29, 2025 at 03:19 PM.
So, for P001177, Bank 1 = PASSENGER side intake. My pic above with the 'leaker' was DRIVER side intake. And, the adjuster that was 'off' when looking thru the timing port was PASSENGER side exhaust. Ugh...




So, for P001177, Bank 1 = PASSENGER side intake.
My pic above with the 'leaker' was DRIVER side intake.
And, the adjuster that was 'off' when looking thru the timing port was PASSENGER side exhaust. Ugh...
> This points to :
-- the ECU having issue with Bank1 Intake position
-- plus Bk1 Exhaust reluctor being a bit shifted.
Having disconnected sensors multiple times...
you're welcome to clear fault and wait for ECU to confirm the same fault again.
> Bk1-EXH: If exhaust is not faulted, its reluctor-ring position is showing borderline to get a correlation code. Normally this calls for a new camshaft unless you can take the time to reset reluctor 1/8".
> Bk1-INT: is flagged as having loose lock... new VVT phaser or a rebuild kit instead.
> There is also a possibility that Bk1 was moved a bit during reluctor pip-hole check.
In which case EXT is totally okay as is.
How... empty tensioners are useless at holding chain slack so camshafts can rotate easily from valves pushing on cam lobes...

+++ COLLATERAL MAINTENANCE...
Working on Bk1 INT is an invitation to renew at the same time :
-- HPFP (100k.Mi)
-- PCV System plastics (cover + conduit)
Both located at the rear of Bk1 camshafts.
Last edited by CaliBenzDriver; Aug 29, 2025 at 04:30 PM.




There are 2 issues for Power system:
2.The actuation of the valve of the oil pump in the combustion engine has an electrical fault or open circuit. P06DA00
2.Communication with control unit ''Suspension'' has a malfunction. U013200
3.The starter battery has excessive resistance. B1F4500
4.Communication with the battery sensor has a malfunction.The message is missing. U113E87
5.There is an internal fault in the instrument cluster.There is an internal component fault. B221396
6.Front LF antenna ''KEYLESS-GO'' has a malfunction.There is an open circuit. B1A5013
These defects causes CAN Bus junk traffic jams swarming CGW that's easily helped by simple "REBOOTS".
Case in point ...
-- the headlight searching for suspension module on basic steel coils.
-- the camera searching for different chassis items
-- the missing GPS antenna that nearly working
This is important because poor COM detunes the engine basic performance.
> Interesting faults to address are:
The KeylessGo antenna issue
The instrument cluster issue
The battery sensor issue
(Is starter battery really going bad ??)
Begin with fault clearing + chassis reboot to sanitize CAN.
Last edited by CaliBenzDriver; Aug 29, 2025 at 04:30 PM.
> This points to :
-- the ECU having issue with Bank1 Intake position
-- plus Bk1 Exhaust reluctor being a bit shifted.
Having disconnected sensors multiple times...
you're welcome to clear fault and wait for ECU to confirm the same fault again.
> Bk1-EXH: If exhaust is not faulted, its reluctor-ring position is showing borderline to get a correlation code. Normally this calls for a new camshaft unless you can take the time to reset reluctor 1/8".
> Bk1-INT: is flagged as having loose lock... new VVT phaser or a rebuild kit instead.
> There is also a possibility that Bk1 was moved a bit during reluctor pip-hole check.
In which case EXT is totally okay as is.
How... empty tensioners are useless at holding chain slack so camshafts can rotate easily from valves pushing on cam lobes...

+++ COLLATERAL MAINTENANCE...
Working on Bk1 INT is an invitation to renew at the same time :
-- HPFP (100k.Mi)
-- PCV System plastics (cover + conduit)
Both located at the rear of Bk1 camshafts.
I’d say the battery is about 4-5 years old. Aside from the engine rattle, this car is perfect, no lights or malfunctioning electronics. No issues on start up, keyless Go, etc. So, interesting that it’s showing these faults. More to come…
These defects causes CAN Bus junk traffic jams swarming CGW that's easily helped by simple "REBOOTS".
Case in point ...
-- the headlight searching for suspension module on basic steel coils.
-- the camera searching for different chassis items
-- the missing GPS antenna that nearly working
This is important because poor COM detunes the engine basic performance.
> Interesting faults to address are:
The KeylessGo antenna issue
The instrument cluster issue
The battery sensor issue
(Is starter battery really going bad ??)
Begin with fault clearing + chassis reboot to sanitize CAN.
I also did a scan on mine and see the same P001177 code for the Bank 1 VVT stored code. I cleared it so ill see if it returns. No other relevant codes, but the oil pump and cooling system faults because those "mods" are active.
i realized im going to need the o-ring gaskets for the cam magnets, so ill get those before diving in. Also doing belt and pulleys as a "while im in there" PM.
The Best of Mercedes & AMG




I also did a scan on mine and see the same P001177 code for the Bank 1 VVT stored code. I cleared it so ill see if it returns. No other relevant codes, but the oil pump and cooling system faults because those "mods" are active.
i realized im going to need the o-ring gaskets for the cam magnets, so ill get those before diving in. Also doing belt and pulleys as a "while im in there" PM.
May rerun my scanner this weekend out of curiosity.
I also did a scan on mine and see the same P001177 code for the Bank 1 VVT stored code. I cleared it so ill see if it returns. No other relevant codes, but the oil pump and cooling system faults because those "mods" are active.
i realized im going to need the o-ring gaskets for the cam magnets, so ill get those before diving in. Also doing belt and pulleys as a "while im in there" PM.
May rerun my scanner this weekend out of curiosity.
I dont think 0.5° timing is a tooth, so my VVT must just be getting loose and shifting slightly. Maybe the tensioners will help, but im probably looking at the bank 1 overhaul in the future.




I dont think 0.5° timing is a tooth, so my VVT must just be getting loose and shifting slightly. Maybe the tensioners will help, but im probably looking at the bank 1 overhaul in the future.
NOT Bk1 timed vs. Bk2.
Most of the VVT lock-pin wear happens to the Intake phasers near idle Rpm on stock oiling setup.
B1Intake - 34°
B1Exhaust - -22°
B2Intake - 33.5°
B2Exhaust - -22°




Now test looks consistent.

Last edited by CaliBenzDriver; Sep 12, 2025 at 09:59 AM.
Did belt, pulleys and belt tensioner as well while I had the IC out of the way.
So far its been like 10 starts and have not gotten any noise. I did turn the motor with the upper covers off and the passenger intake VVT did have some oil come out the front, but never "slipped". I assume im on borrowed time, but hopefully with the tensioners working as designed it will prolong the major work a few years.
The MB sealant i had was expired and it did not set up as expected. Taking forever to cure. From reading up on it, its a 7-21 day full cure anaerobic rubber. Its not leaking so im leaving it as is, but ensure you have a fresh tube if you plan on resealing the covers.




-- MOD-1 "Normal oil pressure" disables marginal pressure that over works VVT locks.
-- MOD-X "Matched oil pressure" enables stable timings disabled by stock oil.
Experiment one step at a time...





@CaliBenzDriver appreciate all the technical insight, was very helpful!
@MatthewJ best of luck on the maintenance!
Will post a few items in the marketplace that I never installed, or removed prior to trade.





@CaliBenzDriver appreciate all the technical insight, was very helpful!
@MatthewJ best of luck on the maintenance!
Will post a few items in the marketplace that I never installed, or removed prior to trade.

What ride has gotten your interest lately ???
Last edited by CaliBenzDriver; Oct 2, 2025 at 10:03 PM.





You can be on the look out for the exact same licensed technologies.
It will be a lot of fun and perhaps a little easier to get serviced




