general problems of the 2014 Mercedes Benz C250

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.

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 hazard and life threatening situation with my Mercedes Benz C250 2014 car. My car 100% serviced over the years at dealership I bought it from rick hendricks Mercedes Benz of lake norman nc. Thank you for your time! actor & model [xxx] [xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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 living, . That perhaps it just may need cleaning rather than replacement . Also per my research this happens quite often with this model it also stated that mercedes C250 was the worst mercedes of that year many many owners have had this problem. The yellow esp light come on saying it is off also my hold brake no longer works. It work at my prior dealer appointment it while going to appointment afterwards it did not work since over 9 years seldom used I wasn't concerned thus that is the message that appears when car fails mercedes wants me to pay I believe $2000 problem not needed.

The contact owns a 2014 mercedes-benz c 250. 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 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.

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.

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.

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.

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.

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.

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.