The vehicle was represented to me as safe to drive, with no major mechanical issues, and that it would pass emissions after only a simple minor fix. After I took possession, the check engine light came on. The car began running rough and showing hesitation. A scan immediately showed a camshaft position sensor fault, cylinder misfire, lean fuel condition, and oxygen sensor/emissions faults. I was also told by a professional shop that the timing chain may be failing. I was then warned that these problems can cause power loss or engine stalling while driving, and that the vehicle in this condition would likely not pass a legal emissions inspection. I was never told about any of these safety or emissions problems before taking the vehicle. This situation creates a safety risk because sudden loss of engine power or stalling can happen in traffic.
Mercedes-Benz C250 check engine light comes on
73 of the 727 owner complaints about the Mercedes-Benz C250 describe check engine light, most of them for the 2012 model year.
- owner complaints
- 73
- worst model year
- 2012
- typical repair cost reported
- $4,400
- typical mileage
- 70,000
By model year
Often reported together
Fuel pump 13Loss of power 12Stalling 11Hesitation 9Won't shift 8Engine failure 7Won't start 3
Trouble codes mentioned
P0340 3P0002 3P008A 1
What owners say
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.
The contact owns a 2012 Mercedes-Benz C250. The contact stated that while driving at an undisclosed speed, there was an abnormal rattling sound coming from the vehicle with the check engine warning light illuminated. The contact drove the vehicle to the shoulder of the road. The contact stated that the rattling sound continued, and the vehicle shuddered abnormally. The vehicle was towed to the residence. The independent mechanic provided mobile service and diagnosed the vehicle with cam shaft timing chain adjuster failure. The contact was informed that the cam shaft timing chain adjuster needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the federal safety agency Hotline and report the failure. The failure mileage was approximately 150,000.
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)
Hola a todos. hace 3 meses compre un mercedes benz c250 año 2012 en argentina. A eso de tener un mes el auto salí a la ruta. (Acá en argentina es muy normal que las rutas sean de un solo carril y doble mano, por lo que hacer un adelantamiento tiene que ser una maniobra muy precisa). Al querer acelerar mi auto a fondo se me cortó la aceleración bruscamente. Perdió la potencia y me encendió la luz amarilla del check engine. Por suerte pude llegar a pasar. Legué a mi casa sorprendido e investigué en las redes. Me encuentro con que la bomba de alta presion de mi vehículo tiene una falla (aparentemente le pasó a mucha gente) Espero que estas quejas lleguen a las autoridades de mercedes benz y se hagan responsables antes de que esta falla provoque un accidente mortal. ENGLISH TRANSLATION: Hello everyone. Three months ago, I bought a 2012 Mercedes-Benz C250 in Argentina. About a month after I had the car, I hit the road. (Here in Argentina, it's very common for roads to be single-lane, two-way, so overtaking requires very precise maneuvering.) When I tried to accelerate my car fully, the acceleration abruptly cut out. I lost power and the yellow check engine light came on. Luckily, I was able to get through. I arrived home, surprised, and I did some research online. I discovered that my vehicle's high-pressure pump was faulty (apparently, it's happened to a lot of people). I hope these complaints reach the Mercedes-Benz authorities and they take responsibility before this fault causes a fatal accident.
The contact owns a 2012 Mercedes-Benz. The contact stated while driving at an undisclosed speed, the Check Engine and High Pressure Fuel Pump warning lights was illuminated. The failure occurred on several different occasions. The vehicle was taken back to the residence. The contact did research and was made aware of an unknown the federal safety agency Campaign Number however, the VIN was not included. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.Â
HIGH pressure fuel pump malfunctions Yes it is available for inspection The car was put in limb mode when at high speed this could have caused an accident with many drivers do to the loss of power Yes it’s been re produced 3 times and others by me No it has not been inspected by a dealer or police or insurance No lamps or symptoms that may be super noticeable, but reduce power and as soon as the high pressure pump fails a check engine light goes off and car has trouble changing gears and accelerating,
The contact owns a 2013 Mercedes-Benz C250. The contact stated while driving at approximately 40 MPH, the vehicle shuddered and stalled. The failure occurred on several different occasions. The check engine warning light was intermittently illuminated. The vehicle was taken to a dealer however, the diagnosis was pending. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 60,000.
The contact owns a 2013 Mercedes-Benz C250. The contact stated while driving 25 MH, the check engine warning light illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed that the camshaft adjuster had failed and needed to be replaced. The vehicle was being repaired. The dealer was notified of the failure. The manufacturer was notified of the failure and informed the contact that the vehicle was not covered under an Extended Warranty because the 10-year time frame had been exceeded. The failure mileage was approximately 94,328.
The contact owns a 2013 Mercedes-Benz C250. The contact stated that while the vehicle was parked, there was an abnormal sound coming from the vehicle. The check engine warning light was intermittently illuminated. The contact was made aware of an unknown recall; however, the VIN was not included. The vehicle was taken to an independent mechanic where it was diagnosed that the cam shaft adjusters needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was approximately 40,000.
Related recalls
No recalls on record for this model year.
Questions about the Mercedes-Benz C250 check engine light
Why does the check engine light come on in the Mercedes-Benz C250?
Owners who report it most often also describe fuel pump failure, sudden loss of power and engine stalls while driving, and the codes they mention most are P0340, P0002 and P008A.
Which Mercedes-Benz C250 years have check engine light problems?
The model years with the most reports are 2012 (36 complaints), 2013 (25 complaints) and 2014 (12 complaints).
How much does it cost to fix check engine light on the Mercedes-Benz C250?
Owners who mentioned a price put the repair at about $4,400 (median of 19 complaints that include a dollar amount). Costs vary with mileage, warranty and where the work is done.
VIN decoder
See the problems and recalls for an exact car
Buying a used Mercedes-Benz C250?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history