Catastrophic Failure due to oil sensors leak
#1
Catastrophic Failure due to oil sensors leak
So, I've had my 2016 E63S since December, bought it from a reputable Mercedes dealership, one owner, clean CarFax, etc., etc., etc., I took it in for it's first service since purchase (Service A1) as it requested to a local, HIGHLY endorsed, Mercedes Master Tech shop with AMG Certifications. Within 20 min of dropping it off they had called me to inform me of the not only ALL 4 Cam Shaft Positions Sensors leaking and leeching oil up the harness, but ALSO the Oil Pressure Solenoid leaking as well and doing the same thing. So yay. Oil is already all the way up the harness into the ECU connector at the brain. Car still runs fine, not an issue as of last night. Call the warranty company to start the process of filing the claim this morning with the 2 yr/24,000 mi bumper to bumper, unlimited warranty I got when I purchased the car, then go to start the car at lunch- COMPLETE CHAOS. Every electrical system has gone haywire, ABS, Traction Control, power steering, speeedo, etc., ALL STOPS. Car immediately in limp mode and have to have towed back to repair place. Needless to say, I'm about to find out if the warranty company, that Mercedes sells as it's aftermarket provider for AMG cars is actually worth a damn. All in all, the motor has to come out, all sensors and solenoids will have to be replaced, complete new wiring harness and (per Mercedes spec) and entire new ECU. (I'm really glad I hadn't put a tune into her yet, bc that would have completely voided ANY coverage, CLEARLY stated in "exceptions") In the end, the ticket estimate at this point is around 16k for the parts and labor. I'm choosing to keep everyone "nameless" at this point because nothing has been determined, once outcomes have been decided, I'll let you know who the players are and whether or not they step up or step out. This will get VERY ugly should the warranty company decide "it's not covered", I can promise lawyers will get involved. I loved this car, I still love this car and hate that this is tarnishing my overwhelmingly positive MB experience over all the years that I have owned them. Moral- go get yours checked, don't rely on a dealership service tech to spot the problem unless they are specifically looking for it either.
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CaliBenzDriver (09-15-2022)
#2
Senior Member
Joined: Feb 2005
Posts: 253
Likes: 49
From: Bay Area, CA
05 C55-gone 06 E55-gone 15 P85D 14 E63 S 11 Sonata 😅
Lots of owners with same issue. Mines is fairly minor but they didn’t check it when I first brought my car in for inspection back Oct but the tech checked this time around
Fletcher jones Mb quote attached
Fletcher jones Mb quote attached
#4
You can literally unplug the harness from the ECU on the top of the motor. If there is oil, you will see it. Everything will be wet with it. Unfortunately, as I found out yesterday, when you unplug it to check, is when you will most likely introduce the major problems to the ECU because you "break that seal". If it's leaking, it will happen eventually anyway, you could just be speeding up the process. And like AMGfifty5 just showed, it's not cheap. My total right now is at about $16,000.
#5
Be sure that they included a new ECU as well. According to the shop that's doing mine, per MB manufacturer specs, they require a new ECU be put in as well and not just "clean" the current one.
#6
Senior Member
Joined: Feb 2005
Posts: 253
Likes: 49
From: Bay Area, CA
05 C55-gone 06 E55-gone 15 P85D 14 E63 S 11 Sonata 😅
Mines came from one cps and so far minor on ecu pins, minor compared to what they have seen on others. I changed all cps and the magnets. So I will be just cleaning the ecu and sockets until it worsens or gets better by some miracle.
i posted pics in other thread.
i posted pics in other thread.
#7
That’s the best scenario! Lol 🤦🏻♂️ Such a shame we have to deal with such a dumb issue on a high end luxury brand car.
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#8
Super Member
Joined: Nov 2010
Posts: 740
Likes: 47
From: Queens,NYC
2014 E63s 1993 mazda rx7 on Boost
After reading this I check my 2014 One CPS has oil
Passenger side exhaust. I have in hand 4 replacement CPS PN A 276 905 10 00.
I will check the oil pressure sensor when swapping these CPS.
Where is the oil pressure switch located.
Magnets are all dry
I will check the oil pressure sensor when swapping these CPS.
Where is the oil pressure switch located.
Magnets are all dry
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NH_E63 (03-01-2023)
#9
Can you post pics of these sensors and where they are at. I'm at 24k miles, I'd like to keep a eye out on this stuff especially since the car is 8yrs old. Who knows how the gaskets are doing.
#10
The camshaft (cps sensors) are very easy to replace . Located visibly on top of the valve covers 4X . The magnets on the other hand look to be an issue on the driver side accessing . I'm looking into doing the magnets myself along with the oil pressure switch as mentioned above . @sunil517 Checking on the location of the oil pressure switch myself now .
#11
Super Member
Joined: Nov 2010
Posts: 740
Likes: 47
From: Queens,NYC
2014 E63s 1993 mazda rx7 on Boost
cam sensor location
Remove the intake tube only not the air box
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NH_E63 (03-01-2023)
#15
Super Member
Joined: Feb 2017
Posts: 916
Likes: 425
From: Baltimore County, MD
13 s212 63 p30. 03 s55amg. 06 LX470
I’m sorry to hear of your woes. I too had to replace and clean some of these parts. My ecu even had oil on the pins. Cleaning took care of the oil and it had not gotten to bad. I had cables on and off without the outcome you described. Imo it’s a little fishy that you took a properly running car to this mechanic and then after they inspect, it’s all messed up. I had what I felt was alot of oil in my harness and no issues. I think it takes more than plugging and unplugging. A professional would also clean those connections before restarting the car.
it sounds like you have multiple issues and normally everything does not fail at once like that and if it’s the ecu, have you tried cleaning those connections. I used almost a whole can of cleaner in that connection until the effluent no longer had color.
can you still try cleaning and replacing the failed parts, or too far down the road?
it sounds like you have multiple issues and normally everything does not fail at once like that and if it’s the ecu, have you tried cleaning those connections. I used almost a whole can of cleaner in that connection until the effluent no longer had color.
can you still try cleaning and replacing the failed parts, or too far down the road?
The following 2 users liked this post by Baltistyle:
CaliBenzDriver (09-15-2022),
mbwillgrubs (05-26-2022)
#16
I’m sorry to hear of your woes. I too had to replace and clean some of these parts. My ecu even had oil on the pins. Cleaning took care of the oil and it had not gotten to bad. I had cables on and off without the outcome you described. Imo it’s a little fishy that you took a properly running car to this mechanic and then after they inspect, it’s all messed up. I had what I felt was alot of oil in my harness and no issues. I think it takes more than plugging and unplugging. A professional would also clean those connections before restarting the car.
it sounds like you have multiple issues and normally everything does not fail at once like that and if it’s the ecu, have you tried cleaning those connections. I used almost a whole can of cleaner in that connection until the effluent no longer had color.
can you still try cleaning and replacing the failed parts, or too far down the road?
it sounds like you have multiple issues and normally everything does not fail at once like that and if it’s the ecu, have you tried cleaning those connections. I used almost a whole can of cleaner in that connection until the effluent no longer had color.
can you still try cleaning and replacing the failed parts, or too far down the road?
#17
The camshaft (cps sensors) are very easy to replace . Located visibly on top of the valve covers 4X . The magnets on the other hand look to be an issue on the driver side accessing . I'm looking into doing the magnets myself along with the oil pressure switch as mentioned above . @sunil517 Checking on the location of the oil pressure switch myself now .
#22
oil in harness
You will find maany vehicle recalls on this issue over years Campaign 2012070002 September 2012 covers a lot of vehicles with no cot off date - copy in W203 foorum
Hope yours is covered.
kerbsne
Hope yours is covered.
kerbsne
#23
Senior Member
Joined: Feb 2005
Posts: 253
Likes: 49
From: Bay Area, CA
05 C55-gone 06 E55-gone 15 P85D 14 E63 S 11 Sonata 😅
This doesn’t apply to many of us since it’s for years 2005-2011 but not sure why they don’t have one for 2014-2016
#25
Is this a fix it and be done for life kind of thing or is this an issue that is just going to recur in the future? Any idea how long the replacement sensors should last before it could start leaking again?