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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.
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
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.
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
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.
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.
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.
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.
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
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
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.
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 .
To remove the driver exhaust sensor I remove the sensor with it being connected. I then had more room to disconnect once that sensor remove. the other 3 are easy to disconnect and check for leaks.
Remove the intake tube only not the air box
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?
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?
Normally, I wouldn't dismiss your claims of "suspicious timing" but I drove the car after the fact and it ran perfect before it **** the bed, so to speak. He had no reason to intentionally "sabotage" anything nor do I think he would risk his 20 yr business with stellar reviews for both of his locations for 1 car. It's honestly "just my luck". My 911 did the same thing several years earlier ("watch out for the water pump, the bearings tend to go between 50-60k", 2 weeks later @ 54k miles spins the bearings in the pump, a Tahoe did the same with the transmission.) All different shops, 20 years apart in timing. Again, just my luck. My current service guy did clean the plug/harness to a degree, before he put it back together, but it only takes 1 tiny little drop to complete a circuit and ground everything out. Like the old saying goes- "If if's and but's were candy and nuts, we'd all have a Merry Christmas", fact of the matter is these are 6 figure cars, with what is touted as some of the best, most precision engineering in the world, technologically advanced, high performance, and the upper echelon of luxury vehicles and they have an incredibly STUPID flaw that can destroy them and typically isn't caught until it's way too late to remedy. Honestly makes me rethink my impression of the brand. Just my opinion though.
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 .
That solenoid is at the oil pump and pan. You have to drop the subframe or pull the motor to complete this job. It's the part labeled #15.
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
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
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
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?
05-24-2022, 06:18 PM
Catastrophic Failure due to oil sensors leak
