2012 Mercedes-Benz E350: check engine light

Filed Aug 31, 2026 · Engine · 152,000 miles · TX

The contact owns a 2012 Mercedes-Benz E-350. The contact stated that while attempting to start the vehicle, the check engine warning light illuminated. The vehicle was taken to an independent mechanic where it was diagnosed with a failed crankshaft sensor. The contact stated that the crankshaft sensor was replaced; however, the failure reoccurred. The vehicle was taken to another independent mechanic where the contact was informed that the crank shaft sensor needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken to another independent mechanic, and the crankshaft sensor was replaced. The vehicle was repaired, but the failure reoccurred. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 152,000.

Filed Mar 12, 2025 · Engine, Fuel system · HI

Recall exists related to a potential issue with the high-pressure fuel pump, which could lead to engine stalling and increase crash risk. My 2012 Mercedes E350 stops the engine in the middle of the road couple of times and for some reason, its stops or shut off the engine completely. The last time I was pulling out on the main road and stop right there. I made a big traffic, and I was scared because I cannot start the car. The guy stops and help me to push out of the road, but we cannot push the vehicle unless someone is inside the car. If I go out, it will automatically go on "park" and cannot push the car. When you check the dashboard the check engine light is not on. 2nd incident I bring this car to Mercedes Benz Dealership, and I told them that there is something wrong in my car, I explain what was wrong but, the guy I talk to, told me that if the check engine light is not coming on, my car is fine. I repeated that the car stops ones in a while when the temperature light is on inside the dashboard and the engine shuts off. He told me if the check engine light turns on then I bring it back. I show the code reading but the same thing he said. I left and went back home and suddenly I get stranded again; I got stock in the middle of the road for 3 to 4 minutes. I start the car and suddenly the car starts and find the nearest place to pull over. I let it call down for couple of hours and start again, the car starts and try to go back home. When I was in the interstate hwy. My car engine shut off, so I quickly pull over, but I was having a hard time to turn the wheel. I believe that this is very unsafe and should have Mercedes Dealer has to repair this issue. I research on the website that 2012 Mercedes Benz E350 have recall to a potential issue with the high- pressure pump and other things like Battery fuse relay box positive terminal and low fuel circuit.

Filed Jun 4, 2024 · Engine · TN

My check engine light has been on for about a year, I have been told by both the dealerships here in Memphis/Collierville that as long as the light is an orange color there is nothing to worry about but it has been on consistently for about a year. I had a Diagnostic test done on [XXX] by Dr. Benz Affordable Mercedes Benz care and it was revealed that ME control module, oxygen sensor, engine wiring harness has oil intrusion all throughout. I would hate to attempt to drive my vehicle and all of a sudden it is severely damaged because of this. I feel this may be a very costly expense and would like some assistance in taking care of this matter. I love my car and have not had any problems, and hope to have it several years more. I only have 116,038 miles on this 2012 vehicle that I purchased in 2015 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 4, 2022 · NY

Totally puzzled.. Intermittent misfire from.exhaust. not a very loud backfire sound. Sounds like a fart or gurgle from exhaust only when I start the car sometimes. No check engine light No lights on the dash Car runs fine, accelerates normal, no ticking, vibrating or shaking..no rough idle Put on a code reader No codes pulled Only misfires after being driven engine turned off and back on. Starts fine. Went to several mechanics and unable to assess misfire due to it being random Spark plugs and coils changed Air filter and cabin filter changed No leaks in the exhaust Looking for answers

Filed Nov 23, 2021 · Engine · 54,700 miles · NV

The contact owns a 2012 Mercedes-Benz E350. The contact stated that after retrieving the vehicle from the dealer, the check engine warning light was illuminated. The vehicle was taken back to the dealer where it was diagnosed that there was oil contamination through the camshaft sensor. The contact was informed that the engine wiring harness needed to be replaced. The vehicle was not repaired. The vehicle was taken to an independent mechanic for confirmation of the diagnosis. The manufacturer was notified of the failure. The approximate failure mileage was 54,700. The VIN was not provided.

Filed Jul 8, 2020 · Engine · 87,000 miles · CA

Tl* the contact owns a 2012 mercedes-benz e350. The contact stated that at start-up, the check engine warning light illuminated. The vehicle was taken to mercedes-benz of sacramento (1810 howe ave, sacramento, ca 95825) where the vehicle was diagnosed with a defective o2 sensor. The contact stated that before agreeing to the repair, he requested that the mechanic inspect the camshaft sensor for a possible link to the failure. The contact was informed that failure had in fact started with the defective camshaft sensor and spread to the o2 sensors and wiring harness. The contact was then given an estimate for the repairs. The manufacturer had been notified of failure and offered financial assistance for the repair but offered no additional assistance. The repair was still pending. The failure mileage was 87,000.

Filed Mar 31, 2020 · Engine · 89,000 miles · AZ

'experienced rattling sounds and took vehicle for inspection to mercedes-benz of tucson (mbt) on 5/9/18 'inspection found secondary chain tensioners producing rattling noise until oil pressure is built up. Est cost of repairs $1497.94. Receipt reads: no consequential damage to be expected 'july 2018 check engine light. Autohaus tucson found engine light related to damaged temp sensor wiring; repaired pack rat damage wiring for ambient temp sensor 'oct 2019 check engine light on; mbt inspection; diagnosis: fault code #p001685-position of intake camshaft is implausible to the position of the crankshaft bank 1; engine out of time due to cam adjuster failure 'mbt stated that they could start repairs until after 11/18/19 as the specialty tech was unavailable 'contacted mbt regularly until they were able to take vehicle in on 12/2/19. 'to date,vehicle has been in the possession of mbt for 119 days 'cost and diagnosis have grown exponentially from $1497 to a whopping $12,000 for extensive engine repairs! 'mbt stated that after repairs were completed, the engine did not operate properly, and they would need to 'break the engine down' again to find the problem 'found the engine was cracked and the cost reflect problems found inside the engine after subsequent repairs were completed 'I have maintained regular maintenance schedules and question whether such damages result from neglect on the part of mercedes benz of tucson or of a manufacturing flaw of the 2012 e350 engine. Neither is satisfactory 'to date, mbt have not supplied me with any tech notes or verification of said damages/repairs 'requesting your assistance in determining if problems exist with the flawed service of mercedes benz of tucson or of a much larger issue with flaws in the manufacturing of 2012 e350 engine. 'at this point, I am not confident that the vehicle is safe to drive

Filed Feb 28, 2016 · Engine, Transmission · 55,400 miles · AL

When starting the vehicle has a slow start. When in motion the vehicle drives rough, and cuts off, then the check engine light came on. This vehicle has a great maintenance record only serviced at the mercedes dealer and has 0nly 54000 miles. This is clearly an engineering issue which was a safety issue. Mercedes repaired. They found the camshaft damaged, head damaged, and gear damaged and replaced camshaft and gear only. They charged my for their engineering failures $4874.38. For this engineering and safety faikure I believe this vehicle should be recalled before the lost health and life is lost, and owners should be recompense for the damage.

Filed Apr 26, 2014 · Engine, Transmission · 20,000 miles · TX · crash

While driving on an express way in dallas, texas my GPS made an error concerning an exit and I was required to divert quickly to the left to make exit lane .time was 6:00 pm ,heavy traffic conditions and road and weather conditions were excellent and dry. My mercedes pre activated a skid mode and there was approximately a 70% cut back in engine power .a yellow engine light came on and skid mode came on operator screen but there was no skidding taking place. I was helpless with no power to keep up with the 50-60 MPH traffic while trying to get into lane .consequently a semi tractor struck my left rear fender /bumper causing damage to my mercedes. There was no damage to the tractor. According to mercedes the vehicle was supposed to do this as a safety feature. If this is true then they actually in my opinion while developing safety features created another un safe condition where as the semi could have run over my wife and I killing us both. This was truly a near miss and we are very much concerned about it happening again to us or some one else, resulting in a fatal accident, not just a fender bender. Mercedes is in denial concerning any un safe condition and refused to take any responsibility for any damage that this car caused. Please review this vehicle for possible call back before some one does get seriously injured. Perhaps skid mode or traction control may be helpful but engine cut back and power loss needs to be left to the operator not the vehicle controlling it's self. Your help would be graciously appreciated.

Filed Sep 4, 2013 · Transmission · 1,040 miles · PA

Vehicle stops accelerating while driving. This has happened 4 times. At all other times, vehicle drives normally. Problem has occurred when accelerating after vehicle brakes have been applied to slow down. This is an automatic transmission and it seems that the car is not down shifting or the auto clutch is not engaging to allow down shift while accelerating. It drives like it's in 4th gear when it should be in 1st or 2nd gear if it were a manual transmission. There is a grinding sound as if the clutch was not pushed in fully while shifting if it were a manual transmission. At this point the car will only go about 10-15 MPH until engine is turned off. When car is restarted, it runs normally. No check engine light comes on. Dealership states no fault codes were stored and they can not fix it unless they have a fault code or see it happen. They did road test it, but it didn't happen while they had the car. They did update the software to the transmission and hope that might fix the problem. I think this is a safety issue, because it happens without warning intermittently. I asked that they call the car engineers and ask what 3 -5 parts or sensors could be causing the problem and check to see if they are working properly, but they said no. They want me to try to drive to the dealership when it happens (not possible, no acceleration) or call for service and leave the car running until someone can get there to identify the problem. If a car or truck were coming up behind me or I was trying to merge onto a highway and this problem happened, I would not be able to accelerate and get out of the way.