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@S. Madman Well done! Did you replace the engine harness or install the jumper pigtails/harnesses?
My Engine harness is not that bad it, but it was starting to get there. I cleaned all the contact, I am hoping that the oil burns/dries out.
Pigtails will help, and I will change them out soon. but the new parts should solve the issue (never hurts to have extra insurance with the pigtails).
The part are the same one FCPeuro has. 2769051000 and 2761560790.
It was nerve wrecking to work on this car, but it was not tough at all. I am not a mechanic either, just a guy with a lot of experience.
Hearing that engine come up was soothing.
One thing I noticed, is that the car would take an extra 1/2-1 crank to start after sitting for 3 days. When I finished (and the car had been sitting for 6 days) it cranked right up.
Here is a summary of latest part numbers. Some parts (cam magnets, cam position sensors) are interchangeable between engines. I believe, but have not confirmed, that the pigtails are interchangeable between engines. Engines likely benefited from these parts include M157, M276, M278. There are additional engines that use these components, I think the M274 is an example.
A2761560790 camshaft adjuster solenoid, 4 required
A2769051000 camshaft position sensor, 4 required
N000000006469 camshaft position sensor screw M6x14, 4 required, torque 9Nm
A0009909506 camshaft adjuster solenoid screw M6x12, 12 required, must be replaced, torque 4Nm + 60 degrees
A2711500153 engine wiring harness extension pigtail for position sensors, 4 required --> I have not 100% confirmed this is compatible with M276 but I think it is. Also, when using the latest part numbers listed above for the sensors and magnets, the extension pigtails may not be needed.
I won't list any engine harness part numbers because these will be different for each engine, and can be looked up using WIS, mbparts.mbusa.com or by calling a dealer.
Here is a summary of latest part numbers. Some parts (cam magnets, cam position sensors) are interchangeable between engines. I believe, but have not confirmed, that the pigtails are interchangeable between engines. Engines likely benefited from these parts include M157, M276, M278. There are additional engines that use these components, I think the M274 is an example.
A2761560790 camshaft adjuster solenoid, 4 required
A2769051000 camshaft position sensor, 4 required
N000000006469 camshaft position sensor screw M6x14, 4 required, torque 9Nm
A0009909506 camshaft adjuster solenoid screw M6x12, 12 required, must be replaced, torque 4Nm + 60 degrees
A2711500153 engine wiring harness extension pigtail for position sensors, 4 required --> I have not 100% confirmed this is compatible with M276 but I think it is. Also, when using the latest part numbers listed above for the sensors and magnets, the extension pigtails may not be needed.
I won't list any engine harness part numbers because these will be different for each engine, and can be looked up using WIS, mbparts.mbusa.com or by calling a dealer.
To update our database , based on my M276 3.0 TT ( 276.820 )
A2761560790 camshaft adjuster solenoid, 4 required
Yes, my engine is to use the above newer part number.
A2769051000 camshaft position sensor, 4 required
EPC does not show new P/N. Mine as installed A276 905 0900 is specific to M276 3.0 Turbo. So I am good on cam position sensor.... Yes ?
My eBay WIS/EPC is 2018 version, I wonder if newer EPC/Xentry would show the same data ?
I can't find in my ebay 2018 EPC the short oil-stop harness 271150273364 .. I wonder why.
Mine as installed A276 905 0900 is specific to M276 3.0 Turbo. So I am good on cam position sensor.... Yes ? I can't find harness 271150273364
MB released camshaft harness adapter part # 2711500156 for 272 & 273 engines however, this thread suggests it also fits 276, 2711502733 = 111 & 271 engines.
cam. adjusters ...
These electromagnets are SOLENOIDS, not "magnets". A magnetic field is created only by the variable coil current... no juice > no magnet! Solenoid it is
The PWM square wave command sets the plunger to a deepth that alows oil pressure to rotate the VVT phaser gear. The camshaft sensor report back to the ECU what is physically happening. Based on the target angle, the ECU varies the duty cycle of the cam. adjuster.
This sofisticated system is trying to iron out many variable factors to tune the DOHC timing:
oil pressure,
oil viscosity,
camshaft RPM,
DC voltage,
operating temperature,
...(leaky tensioner seals)
and it works !!😎
-------
EDITS:
It would be interesting to learn the logic coded in the ECU to regulate the pressure of engine oil pump with a solenoid.
Like does the ECU boost oil pressure when VVT is having a hard time moving phasers?
Last edited by CaliBenzDriver; Jun 7, 2021 at 02:27 AM.
Reason: pump pressure control
Seems even the alu baby bolts had part number revision. I hope MB indonesia stock these, but I am willing to indent. No worry.
The o-ring stay the same P/N
For those wanting to do DIY and not familiar with the connector locking mechanism, more so the Camshaft solenoid/electromagnet, below is how to do it.
Pressing down the white plastic locking mechanism DOES NOTHING.
White plastic locking mechanism is a stand alone LOCK only, so that inside one, the plastic "springy" latch mechanism can't be accidentally be lifted up by vibration.
The black plastic inside the connector, its the "springy" latch mechanism. This one you have to lift up and please use a wooden or plastic tooth pick and not anything hard like screwdriver.
To why the camshaft solenoid/magnet connector one is not as easy to remove as the small camshaft position sensor, is because as explained below, the "springy" latch mechanism hides inside by a few millimeters.
The small camshaft position sensor is easy to un-latch, because the black plastic "springy" latch mechanism actually is reachable by our finger nail.
Last edited by S-Prihadi; Jun 7, 2021 at 01:46 AM.
Reason: typo
Don't you think it's kinda weird how both solenoids and sensors have been leaking oil into the harness for well over a decade but only only a single pigtail repair is available for the solenoids and nothing for the sensors ...
Don't you think it's kinda weird how both solenoids and sensors have been leaking oil into the harness for well over a decade but only only a single pigtail repair is available for the solenoids and nothing for the sensors ...
Looking at the part number revision histories, it seems like the pigtail was a quick field fix. Then MB updated the part numbers (changed the part designs) and seem to have arrived at a permanent corrective action without the use of pigtails. That's just one possible narrative.
Now, my M276 3.0 TT.
Camshaft solenoid gets new P/N.
Camshaft sensor remain same number from a car with delivery date out of Germany 30th Aug 2013. Car is called model year 2014, by MB Indonesia.
======================
Sales designation: E 400
Order number: 0 3 831 21072
Delivery date: 30 08 2013
======================
Does that means the Camshaft sensor for my M276 3.0 TT is an updated one already ?
So did MB did the fix sooner with cam sensor than it did with cam solenoid ?
Or M276 3.0 TT not old enough to leak its cam sensor .... , so MB lay low and kept quiet.
The M276 3.0 TT in a GLE43 uses the same solenoid and position sensor that you listed for an E400. This makes the 3.0 TT seem to be different than the M276 3.5 NA/M157/M278/M274.
A 2018 M157 5.5 TT in a W166 GLE63s uses position sensors A2769051100 which took effect in 2012.
In my opinion from the research, using the latest part number for solenoids and position sensors is a good idea for any of these engines. However, no MB documentation that I have seen states this.
Sharing "Price feel" and parts availability in my country. From Official MB supplier, via my regular indie workshop.
Usually my indie workshop buy from here : https://www.dipomotor.mercedes-benz....asa-motor.html
I don't go direct when I buy MB parts, I want to support my indie workshop and I want 100% genuine for such critical component.
Good price in my opinion.
Will report back when parts in hand and swap done.
I got the cam sensors done easily, but how do you replace the magnets? There's very little access on the driver's side of the engine, with two A/C hard lines in the way and not much space.
Parts arrived yesterday.
The electromagnet solenoid has o-ring included..ha ha ha. I did not know that and have ordered separately.
The part number sticker below is Dipo Motor ( MB Indonesia ) own numbering system, where MB numbering is A016 xxx xx xx, Dipo's called it MA016 xxx xx xx
The thread lock green color on the screws I believe it is the category C - Microencapsulated bolt , attached MB explanation on their use or limit. Doc : Notes on self-locking nuts and bolts ah0000n000101a
S-Prihadi, I'll be interested to hear how you make out with the swap. I just changed my sensors yesterday after discovering that the two right bank sensors had been leaking. The cam adjusters have not been leaking so I will monitor for now, and replace at some point.
I had a good look at one of the leaky sensors with a lighted magnifier, no obvious signs of defects that could cause leakage. I'm going to bring it into work and take a closer look under a scope.
The interesting thing is the old sensors I had pulled out. They are made by Continental, part number A276905. All 4 have a stamping of "01 43" , could be a cryptic date code. I'm guessing these are not the original OEM sensors? If not, I'm surprised that two of them are leaking!
S-Prihadi, I'll be interested to hear how you make out with the swap. I just changed my sensors yesterday after discovering that the two right bank sensors had been leaking. The cam adjusters have not been leaking so I will monitor for now, and replace at some point.
I had a good look at one of the leaky sensors with a lighted magnifier, no obvious signs of defects that could cause leakage. I'm going to bring it into work and take a closer look under a scope.
The interesting thing is the old sensors I had pulled out. They are made by Continental, part number A276905. All 4 have a stamping of "01 43" , could be a cryptic date code. I'm guessing these are not the original OEM sensors? If not, I'm surprised that two of them are leaking!
@Couch67 Great photo, thanks for posting. A theory on the oil leaking is that the black plastic injection molded sensor housing has cracked or been compromised, and allows oil to pass into the body itself and then out the connector pins and into the engine harness.
Visual inspection has not provided a definitive clue yet, for the posters who have attempted to find the source of oil leakage.
One suggestion that I don't think has been attempted is to slightly pressurize the sensor with air from the connector end and either listen for hissing, or hold it under water and look for bubbles. This can be done by using a suitable diameter rubber hose, clamped in place to the sensor with a hose clamp. Do the same with opposite end of the rubber hose to an air source - an air compressor set to very low pressure or a bike air pump. This to me would rule in, or out, the cracked sensor body theory.
Balti, what is the actual Part Number for your cam sensor and what is the updated one ?
I am wondering if E63 of 2012 has different P/N.
Thanks
sorry I had trashed them prior to posting the pic. Newest was through fcp. Same with all the timing parts I installed, check valves, magnets, tensioners.
Last edited by Baltistyle; Aug 1, 2021 at 03:48 PM.
S-Prihadi, I'll be interested to hear how you make out with the swap. I just changed my sensors yesterday after discovering that the two right bank sensors had been leaking. The cam adjusters have not been leaking so I will monitor for now, and replace at some point.
I had a good look at one of the leaky sensors with a lighted magnifier, no obvious signs of defects that could cause leakage. I'm going to bring it into work and take a closer look under a scope.
The interesting thing is the old sensors I had pulled out. They are made by Continental, part number A276905. All 4 have a stamping of "01 43" , could be a cryptic date code. I'm guessing these are not the original OEM sensors? If not, I'm surprised that two of them are leaking!
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
............. 
, so MB lay low and kept quiet.
