2014 Mercedes-Benz C250: check engine light

Filed Sep 27, 2025 · Brakes, Engine · NV

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 it was a traumatic experiance when I pressed the break and the break got super hard and in a Locked position and would not come to a stop, there was no warning lights, no engine lights, nothing. (increased braking effort, and potentially I was inches of collision risk. I had the car towed to the nearest shop and was told this is a collapsed break booster Vacuum pump, and possibly the hose and lines and possibly further problems but they would need to replace the Vacuum pump first. After I looked to see if there was a recall on the vacuum pumps in that model on google and it says the following; Google- 2014 Mercedes c250 recall on Vacuum pump A-Premium Vacuum Pump Compatible With Select Mercedes ...Yes, there was a recall on certain Mercedes-Benz vehicles, including some 2014 C250 models, related to a defective brake booster vacuum hose. The recall involves hoses that may delaminate over time, leading to a loss of vacuum, increased braking effort, and potentially a collision risk. To check if your specific 2014 C250 is affected by this recall, you should contact an authorized Mercedes-Benz dealer or visit the Mercedes-Benz USA website to check for open recalls for your vehicle's VIN.

Filed Jul 10, 2025 · Engine · 73,324 miles · CA

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 the federal safety agency report on 2012-2015 W204 and W172 vehicles(C250 and SLK250) equipped with the M271 engine. I would like the federal safety agency 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)

Filed Jul 5, 2024 · Fuel system · FL

I bought my 2014 C250 back in 2017 with 17K miles and currently has 58,570 miles. The issue is with fast acceleration from a stop or slow moving. When trying to accelerate to merge with traffic after a few seconds the vehicle goes into limp mode and the check engine light comes on. In limp mode I am only able to accelerate very slowly and this is a major concern for my safety. This has been and ongoing issue over the past few years and I have learned to reset it temporarily (around 10 times) with a YouTube fix. I recently found out that there was a recall for the high pressure fuels pump on some C250 models but mine was never included. I also found out that the recall time limit has expired. Please investigate and expand the recall along with the time limit so my vehicle will be included.

Filed Apr 3, 2024 · Engine · 56,000 miles · LA

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.

Filed Aug 15, 2023 · Engine, Fuel system · 123,000 miles · FL

The contact owns a 2014 Mercedes-Benz C250. The contact stated while driving 60-62 MPH, the vehicle lost motive power. The check engine warning light, the traction control warning light, and other unknown warning lights were illuminated. The contact veered to the side of the road. The contact was able to restart the vehicle after several attempts. The contact was able to continue driving. The dealer was notified of the failure and referred the contact to AutoZone. The vehicle was taken to AutoZone, where it was diagnosed that the fuel injectors and the ECM had failed. The contact sent a diagnostic report to the used car dealer where the vehicle was purchased, but no assistance was provided. Additionally, the contact stated that the control arm had fractured. The vehicle was not repaired. The dealer and manufacturer were not notified of the failure. The failure mileage was approximately 123,000.

Filed Aug 7, 2023 · Engine, Visibility · 54,315 miles · FL

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.

Filed Jan 3, 2023 · Engine · FL

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.

Filed Aug 1, 2022 · Engine · NY

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

Filed Sep 15, 2021 · Acceleration, Engine · CA

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 a failure of the high pressure fuel pump. I also tried to see if this will happen again and after hard acceleration in regular driving mode, the exact same issues occurred. I have read that there are issues with the high pressure fuel pump with my car model and I ask that you guys please investigate thoroughly to see if a recall would be necessary. Losing power while accelerating is extremely dangerous and a huge safety hazard for all drivers on the road. I could have easily been rear ended by another driver since I couldn’t accelerate to a faster speed. I have not yet replaced the high pressure fuel pump but plan to do so in the next few days. Attached is the diagnostic invoice from the Mercedes dealership. As stated on the invoice, please note that my car only has 43,000 miles, which makes the high pressure fuel pump failure very surprising.

Filed Aug 23, 2019 · Engine · 75,000 miles · CA

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.

Filed May 10, 2018 · Electrical, Engine · 50,187 miles · FL · fire

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 to the dealer. The dealer stated that the failure was not caused by the previous repair. The manufacturer was made aware of the failure and opened an investigation. The failure mileage was approximately 50,187.

Filed Oct 3, 2015 · Electrical, Engine · FL

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 let my brother use the car he was almost hit while making a left turn because of the random power loss. I have contacted mbusa and spoke with someone named juan. I continued to call him ans take the vehicle to the dealer everytime it happened expressing my concerns abiut the car as well as safety. Juan intiallly acted as if he cared but that was shor lived as he finally called back on 10/2/15 and explained that his managers and mbusa were unable to create the issue at the dealer level so there is nothing they will do at this point... At that point I realized that there is nothing that mbusa will do for me and that I will continue to forced to drive and pay for a very unsafe vehicle.