2014 MERCEDES-BENZ C250 Engine Problems

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

I was coming off the freeway on 9/25/25, and when I pressed on the breaks they completely locked up and would not break at all. The car turned off, no warning lights nothing, and I continued to hit the break and the car would not stop, then all of a sudden it came to a stop almost colliding within inches of hitting the Semi-Truck in front of me. This is the second time in one year that this has happened to me, I have had the car checked out the first time last year immediately, and even paid to diagnose it, nothing, I had the brakes and rotors replaced last June of 2024 when this happened. Since then the car has only been in the dealership to get the car Fully checked out mutltiple times within 2024, 2025 and repaired by Mercedes dealership. On 9/25/25 this happened to me and...

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)

Driving on [XXX] to Atlanta GA my car would not automatically shift and began to vibrate badly. I was almost hit by other vehicles as I pulled off the highway to check car out. Car was vibrating badly in idle and when I resumed my trip back home the car would not accelerate properly and caused tremendous stress and danger. Figured out that car would not shift automatically and I was forced to shift the car manually. Car would sputter and vibrate badly and would only slightly less vibrate to where I could drive it home in gear D5 and would less vibrate at 75+ mph very dangerous, and would lose power and shake violently going up highway hills. I prayed all the way home and barely made it shaken. I called my Mercedes Benz Dealer from the highway and immediately scheduled appointment on 8/15/24. This was a major safety...

I was driving on the highway my car sort of hesitated for a brief second then continued on as if nothing about one mile later my car began to slow down while I was in traffic so asap I pulled over at this point I could only go about 40 miles per hour which was very terrifying at that time it came a complete stop. After restarting the car 3-4 times it stayed running I continue home which was about 12 miles from my current location. For the next few days I did not go any where. I then had an appointment to have the 80,000 mile maintenance I mentioned the problem I was then told I need a throttle body replacement costing more than $2000 that I can not afford. At that time I started researching my own problem. My relative who works on 18 wheel truck for a...

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 contact owns a 2014 Mercedes-Benz C250. The contact stated that the vehicle was getting water inside the cabin from a leak coming from the sunroof. The contact stated that while driving at various speeds, the vehicle started jerking and making a choking sound as if the vehicle was going to shut off. The check-engine warning light was illuminated. The vehicle was taken to the dealer who determined that there was an electrical failure related to the leak coming from the sunroof leak and that there were corroded cam blocks. The cable for the sunroof was replaced along with the mats on the floor. The contact was unsure if the engine was repaired. The contact stated that the check engine warning light was intermittently illuminated, and the jerking of the vehicle persisted. The manufacturer was not made aware of the failure. The approximate failure mileage was 54,315.

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...

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...

I was trying to merge onto a freeway from a complete stop and because this freeway has an extremely short on-ramp, you need to get up to a high speed in very little time. As such, I put my car in Sport driving mode and accelerated very hard from a complete stop. The car accelerated as normal for a few seconds (I reached approximately 40 to 50 MPH), then I felt the car lag and felt a loss of power. The car was in limp mode and I couldn’t accelerate even though I was pressing the gas pedal all the way to the floor. A few seconds after this occurred, I notice that the check engine light turned on. I was able to maintain a speed around 50 MPH and got off the freeway. I took my car to both the Mercedes dealership and an independent mechanic and both diagnosed...

CABIN FILLS UP WITH FUEL SMELL, VISIBLE LEAK UNDER FUEL TANK AND BY THE FRONT LEFT TIRE. LEAK AND SMELL OCCURS BOTH IN MOTION AND STATIONARY/IDLE.

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...

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.

TL* THE CONTACT OWNED A 2014 MERCEDES-BENZ C250. WHILE DRIVING 60 MPH, THE VEHICLE CAUGHT ON FIRE WITHOUT WARNING. THE CONTACT STATED THAT THE FAILURE OCCURRED WHEN RETRIEVING THE VEHICLE FROM THE DEALER AND THAT THE VEHICLE HAD BEEN AT THE DEALER FOR THREE MONTHS. THE POLICE DEPARTMENT WAS CALLED, BUT A POLICE REPORT WAS NOT FILED. NO INJURIES WERE SUSTAINED. THE FIRE DEPARTMENT WAS ABLE TO EXTINGUISH THE FIRE. THE VEHICLE WAS TOWED TO MERCEDES BENZ OF PALM BEACH (4000 OKEECHOBEE BLVD, WEST PALM BEACH, FL 33409). THE MANUFACTURER INSPECTED THE VEHICLE AND STATED THAT THEY WERE NOT LIABLE FOR THE FAILURE. THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 50,200.

TL* THE CONTACT OWNED A 2014 MERCEDES-BENZ C250W. WHILE DRIVING APPROXIMATELY 40 MPH, THE VEHICLE BEGAN TO DECELERATE ON ITS OWN AND THE CHECK ENGINE INDICATOR ILLUMINATED. THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF PALM BEACH (4000 OKEECHOBEE BLVD, WEST PALM BEACH, FL 33409, 561-689-6363) WHERE IT WAS DIAGNOSED THAT THE FUEL PUMP NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. WHILE DRIVING BACK HOME AT APPROXIMATELY 30 MPH, THE DRIVER HEARD A HISSING SOUND AND DARK SMOKE GUSHED FROM UNDERNEATH THE HOOD WITHOUT WARNING. THE VEHICLE WAS PULLED OVER TO THE SIDE OF THE ROAD. FLAMES APPROXIMATELY SEVEN FEET HIGH POURED OUT FROM THE HOOD AND ENGULFED THE ENTIRE VEHICLE. THE POLICE AND FIRE DEPARTMENTS WERE CALLED TO THE SCENE. THE FIRE WAS EXTINGUISHED BY THE FIRE DEPARTMENT. THERE WERE NO INJURIES AND A POLICE REPORT WAS NOT FILED. THE VEHICLE WAS DESTROYED AND TOWED BACK...

I HAD BEEN DRIVING ON THE FREEWAY, GOT OFF ONTO A SIDE ROAD AND WHEN APPROACHING A STOP LIGHT WHILE BRAKING: MY CAR COMPLETELY DIED (WHILE IN DRIVE). THE MOTOR SHUT OFF, THE ELECTRICAL DASH SYSTEM LIGHTS ALL WENT OFF AND THE HAZARD TRIANGLE SYSTEM CAME ON (WITH THE SYMBOL OF AN EXCLAMATION MARK(!) INSIDE THE TRIANGLE). AFTER ABOUT A MINUTE AND A HALF, I PUT IT IN PARK, AND IT RESTARTED. SCARY! I HAD A FULL TANK OF GAS.

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...

TL* THE CONTACT OWNS A 2014 MERCEDES BENZ C250. WHILE THE VEHICLE WAS PARKED, THE CONTACT NOTICED A LEAK COMING FROM THE RADIATOR AND THE TRANSMISSION. IN ADDITION, THE CONTACT NOTICED FUEL FUMES COMING FROM THE OIL PAN AND DIP STICK IN THE VEHICLE. THE VEHICLE WAS TAKEN TO A DEALER WHO WAS UNABLE TO DIAGNOSE OR REPAIR THE VEHICLE AND STATED THAT THE VEHICLE FUNCTIONED AS INTENDED. IN ADDITION, THE MECHANIC WAS UNABLE TO FIND ANY LEAKS. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 20,000.

I LEASED MY VEHICLE IN NOVEMBER OF 2013. THE VEHICLE IS DRIVEN TO AND FROM WORK AND IN THE BEGINNING I NEVER HAD A PROBLEM. A FEW MONTHS AGO I WAS DRIVING DOWN THE FREEWAY AT 70 MPH AND ALL OF A SUDDEN THE CHECK ENGINE LIGHT CAME ON AND THE VEHICLE LOST POWER. THE VEHILE WOULD VIOLENTLY SHAKE WHE TRYING TO ACCELERATE. I MANGED TO CONTINUE TO DRIVE FOR ABOUT ANOTHER 30 MINUTES AND MADE IT TO THE DEALER AND TURNED THE CAR OFF BUT ONCE THEY RESTARTED IT THE CAR RAN FINE. SINCE THEN THEN CAR WILL RANDOMLY LOOSE POWER ALL OF A SUDDEN IT HAS BEEN TO THE DEALER 3 OR 4 TIMES AND THEY KEEP IT FOR A WEEK AND THEN GIVE IT BACK AND SAY THAT THEY WERE NOT ABLE TO RECREATE THE ISSUE. I HAVE ALMOST BEEN HIT ONCE SO FAR AND WHEN I...

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...

I WAS DRIVING FOUR DAYS AFTER I LEASED MY BRAND NEW C250 2014 MERCEDES, AND THE CAR DIED IN THE MIDDLE OF A BUSY STREET. THE COP AND I COULDNT EVEN MOVE IT TO THE SIDE OF THE STREET. I AM WORRIED THIS WILL HAPPEN AGAIN. THUS I HAVE BEEN CALLING MERCEDES TO PLEASE REPLACE THE CAR WITH A SAFE ONE. *TR