2014 Mercedes-Benz C-Class Engine Problems

my car overheats badly and shakes and it is starting to smoke from the hood in snowy conditions

My Mercedes Benz 2014 W204 C250 initially had a noise during startup. The startup noise became louder and now my car does not start. Also, the check engine light indicate a cam shaft position sensor error. Looking online it appears that my problem is exactly like the problem described in a NHTSA report on 2012-2015 W204 and W172 vehicles(C250 and SLK250) equipped with the M271 engine. I would like NHTSA assistant in getting my Mercedes Benz W024 C250, VIN [XXX] included as part of extended recall of the same car and engine and repaired. If more information is needed, please contact me. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2014 Mercedes-Benz C250. The contact stated that upon starting the vehicle, an abnormal rumbling noise was detected. The vehicle had hesitated to start. The engine warning light was illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the timing chain tensioner needed to be replaced. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 56,000.

The intake manifold blew on my car while it was off overnight and I took it to the Mercedes dealership to have it fix and the next day I got it back after it was repaired the same problem happened again when I went to unlock my car I heard a bang and smoke coming from the engine

On December 14, 2022 at approximately 3:45 pm in rush hour traffic in the high speed lane on i-75 in Bradenton, Fl, the 2014 Mercedes C250 I was driving lost total engine power, traveling from 80mph to 0 in seconds. I had just enough time because of the momentum of the speed I was traveling at to maneuver the car into the breakdown lane adjacent to a median construction site. Had I been traveling in the middle lane there would have been insufficient time to change lanes in heavy, fast traveling traffic and get to a breakdown lane. In other words, we could have been killed. There was no check engine light nor warning lights of any kind. The engine was quiet and there was no engine rattling noise or shuddering prior to the incident during over 7 hours of travel from Marietta, Georgia into Florida. The car had been purchased from a used car dealer in Marietta two days before and had passed the Georgia emissions test on 11/18/22. We had the car towed to a Mercedes Benz dealership 20 miles away in Sarasota. On 12/16/22 Mercedes mechanics deemed the catastrophic engine failure to be due to a broken timing chain (this was confirmed in a conversation12/21 with Mercedes Sarasota Service Manager Jim Foulkrod) and that there was no compression in the engine. Among the codes which came up during Mercedes multi-point inspection was 036562, exhaust cam signal and 34164. Mercedes’ estimate to fix the car was $24,222.13. We declined to move forward with engine repairs. Mercedes was threatening to charge storage fees so the car was donated to the charity, Veteran Car Donations, Heroes on the Water which towed the car on 12/20/22. The car remains with the charity awaiting title transfer information.

The Cam Shaft and the boost pressure need to be replaced immediately. I took my car to a Mercedes Benz dealership in Long Island, NY for a regular oil change (nothing was wrong with my car when it went in for the oil change). When they gave me back my car I literally got 1 and half blocks from the dealership and my car was jerking violently and the check engine light came on and has not gone off since that day. I took the car right back to the dealership and of course they are saying they did nothing to make this happen and are refusing to cover the repairs for the Cam Shaft and boost pressure to make my car run correctly again. This is a dangerous car to drive now because due to this same problem the car has random issues accelerating and has put me in dangerous situations while driving on the highway and on the street. The interesting part is Mercedes Benz knows that this is a serious issue with this car because I was told that by the people that work at the dealership that Mercedes is covering the full repairs for what my car is going through but they are only doing it for people who's cars are under 120,000 miles. My car is at 133,000 miles and they are refusing to cover the repairs for me. My complaint number with Mercedes Benz customer service is 2-29420067413. They are not being helpful because they told me that every Mercedes dealership in the United States is independently owned besides the one in Manhattan NY. They are telling me that even though they are the manufacturer each dealership makes their own decisions. This is absolutely absurd and my car is dangerous to drive at this point. They want $5,000 and counting from me to repair my car for something that they messed up on and that they know is a known issue. Please help me get this resolved. Thank You

2 CAMSHAFT ADJUSTERS REPLACED AT 104,000 MILES. SOME FAIL EVERY 50-60,000 MILES. WORK DONE AT HOEHN MERCEDES. BEFORE REPAIR - SLOW CRANK AT START, SOME SMOKE WHEN ENGINE STARTING, CHECK ENGINE LIGHT CAME ON. *TR

TL* THE CONTACT OWNS A 2014 MERCEDES-BENZ C250. WHILE DRIVING, THE VEHICLE FAILED TO ACCELERATE ABOVE 40-50 MPH AND STALLED. THE VEHICLE WAS ABLE TO RESTART AND THE CHECK ENGINE INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF VALENCIA (23355 VALENCIA BLVD, SANTA CLARITA, CA 91355, (661) 753-5555) WHERE IT WAS DIAGNOSED THAT THE CAMSHAFT AND ENGINE SENSOR NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED; HOWEVER, THE FAILURE RECURRED. THE MANUFACTURER WAS CONTACTED AND REFERRED THE CONTACT TO THE LOCAL DEALER. THE FAILURE MILEAGE WAS 75,000.

IN JUNE OF 2018 WE HAD TO HAVE CAM SHAFT WORK DONE ON OUR CAR WHICH WAS SLIGHTLY OVER THE MANUFACTURE WARRANTY. THIS TOOK TWO TRIPS TO THE SHOP AND ABOUT $10,000 IN REPAIRS BECAUSE THE ONE SIDE FAILED THEN WITHIN A FEW WEEKS THE OTHER SIDE FAILED. I HAVE READ ON THE WEB MANY PEOPLE HAVE HAD THE SAME ISSUE AND IT BEGINS RIGHT AFTER THE WARRANTY GOES OUT. NOW THERE IS AN ISSUE WITH THE TIMING CHAIN WHICH I READ SHOULD HAVE BEEN REPLACED WHEN THE CAM SHAFT WORK WAS DONE. ALL THESE ISSUES WITH THE SAME MODEL AND THERE HAS BEEN NO RECALL. MERCEDES TOLD US IT IS A PROBLEM WITH THE C250 AND IT WILL PROBABLY HAVE TO BE DONE AGAIN AFTER ANOTHER 50,000 MILES. I DON'T UNDERSTAND IF THEY ARE AWARE OF THIS ISSUE WHY THEY HAVE NOT CORRECTED IT. IT COSTS ABOUT $5000 EACH TIME!

TL* THE CONTACT OWNS A 2014 MERCEDES-BENZ C250. WHEN THE CONTACT PRESSED THE PUSH START BUTTON, IT TOOK APPROXIMATELY ONE MINUTE TO START THE ENGINE. THE CONTACT STATED THAT THE FAILURE OCCURRED FOR AT LEAST THREE MONTHS ON A DAILY BASIS, BUT WAS NOW OCCURRING APPROXIMATELY FOUR TIMES PER DAY. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DETERMINED THAT THE TIMING CHAIN AND CAM SHAFT FAILED. THE DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 61,000.

RANDOM ENGINE STALL INVOLVING TURBO AND INTERCOOLER: WE PURCHASED THIS 2014 C250 WITH ROUGHLY 8,000 MILES FROM NEARBY MB DEALER. WE HAVE ENJOYED THE CAR IMMENSELY, EXCEPTION THIS VERY SERIOUS "DEFECT" WITH THE ENGINE. OBSERVED ON THREE SEPARATE OCCASIONS, THIS PROBLEM IS VERY SERIOUS AND COULD LEAD TO POTENTIAL COLLISION WHILE PASSING ANOTHER VEHICLE, BECAUSE THE ENGINE "STALLS" UNDER INTENSE ACCELERATION RANDOMLY, LEAVING ONLY ONE CYLINDER WORKING. WITH THIS ONE REMAINING CYLINDER, THE CAR CAN BARELY BE OPERATED, SHAKING ETC., BUT CAN BE MANEUVERED OFF THE ROAD IF POSSIBLE IN TRAFFIC, SHUT OFF, AND RE-STARTED WITHOUT ANY AFTER-AFFECTS. WE TOOK TO THE DEALER TWICE, AND BOTH TIMES THE MB DEALER ADMITS THERE IS A VERY REAL PROBLEM WITH, ALLEGEDLY, THE "INTERCOOLER," AND THAT "ALL C250 ENGINES HAVE THIS SAME POTENTIAL PROBLEM," AND FURTHERMORE, MERCEDES DOES NOT CURRENTLY HAVE A SOLUTION OR FIX, BUT IS WORKING ON IT. NOTE: IT'S BEEN SIX MONTHS SINCE I REPORTED MY INITIAL PROBLEM AND HAD IT RECORDED (FILED AT THE DEALER). THE CAR COMPUTER DOES INDICATE THE PROBLEM EXISTS, AND RECORDS EACH INCIDENT. PROBLEM: MB DOES NOT HAVE A SOLUTION CURRENTLY. IT IS VERY DANGEROUS TO HAVE THE CAR UNDER FULL ACCELERATION IN SPORT MODE, AND THEN THE CAR SUDDENLY WITHOUT WARNING SHUTS DOWN ("COMPUTER GENERATED STALL"). I WAS FORTUNATE TO BE GOING VERY FAST MERGING ONTO INTERSTATE TRAFFIC, THEN ABLE TO GET OFF THE ROAD BEFORE I WAS REAR-ENDED. THIS SAME SCENARIO HAS OCCURRED ON TWO OTHER OCCASIONS WITHOUT ANY ACCIDENT, AND WHILE MOTOR WAS NOT EVEN HEAVILY STRESSED AS THE INITIAL INCIDENT.

LEASED OUR MERCEDES AND SHORTLY AFTERWARDS WE STARTED EXPERIENCING HESITATION, LAGGING AND EVEN STALLING OF THE VEHICLE AS WE TRIED TO ACCELERATE. TWICE THE VEHICLE HAS STALLED AS WE PULLED INTO TRAFFIC, NARROWLY ESCAPING POSSIBLE INJURY AND DAMAGING SEVERAL CARS. HESITATION HAS OCCURRED WITHOUT WARNING, (PRESSING ON ACCELERATOR AND THE ENGINE DOES NOT RESPOND BY EVIDENCE OF NO RPM INCREASE). AGAIN, THIS HAS OCCURED NUMEROUS TIMES. WE HAVE HAD THE VEHICLE BACK TO MERCEDES FOUR TIMES, FOR A TOTAL OF 39 DAYS!!!! AND STILL TO THIS DAY, THE VEHICLE STILL HAS THE ISSUE, WHILE MERCEDES CLAIMS THERE ISN'T A PROBLEM WITH THE VEHICLE. THEY HAVE GIVEN US EVERY EXCUSE IN THE BOOK OF WHY NO PROBLEM EXISTS, EVEN AFTER THE SERVICE MANAGER STATED THAT THE CAR HAS A 6 SECOND DELAY WHICH IS UNACCEPTABLE!!!!!!! TWO DIFFERENT INDIVIDUALS HAVE DROVE THE VEHICLE AND EXPERIENCED THE SAME HESITATION PROBLEM. THE CAR IN OUR EYES IS A HAZARD TO THE STREETS AND HIGHWAYS OF THE STATE OF FLORIDA. WE ARE PAYING FOR A CAR THAT IS DANGEROUS AND HAS THE HIGH PROBABILITY OF CAUSING AN ACCIDENT WITH CATASTROPHIC RESULTS...........