Ten problems related to check engine light on have been reported for the 2012 Mercedes Benz C250. The most recently reported issues are listed below.
When accelerating to pass on highway car suddenly goes into limp mode and losses power this is dangerous at 70 plus miles per hour, ecm code reads p0002 high pressure fuel regulator failure, check engine light will stay on until car has been shut off for longer than ten minutes or if you have a scanner you can erase code and drive the car normal, no passing. This has also happen pulling out from a stop light car has buckle with immediate power loss and will only creak up in limp mode just enough to get you home. I am a well season mechanic with over 20 years experience and this is absolutely dangerous. Please don't wait until someone gets hurt or killed by this which is a known issue going back before 2012. This happened 3 times this ast week and today.
2012 C250 purchased new from a dealer. Rattling on starting engine and check engine light is on. Spoke with my mechanic and it is due to faulty camshaft adjusters. Repair will cost $5000 plus and involves replacing the camshaft adjusters, timing chain and sprockets. This problem just started 10 days ago with approximately 38,000 miles on the odometer. Seems to be a well known problem and not an expense I can really afford on reduced income due to covid lockdown. I am very worried about driving this car as this problem can result in catastrophic engine failure and I am regularly on the freeway. Driving this car is no longer safe. I purchased a mercedes thinking their reputation for safety, quality and engineering would preclude such issues.
I was driving a of maybe ten minutes on the highway . As soon as I was off the highway ; the vehicle suddenly stopped without warning of a check engine light . (malfunction). Days before that the vehicle was serviced at a Mercedes Benz dealership without any issues. After their research I've been told that I need a new engine . There are complaints after complaints listed online in regards to engine failure, cam shaft adjusters etc. This is something that clearly needs to be handled . This could have caused a life threatening situation.
My check engine light came on while driving and I had it checked by a mechanic, the obc code was p0340 camshaft adjuster. My vehicle has less than 100,000 miles the camshaft adjuster should not need to be replace until around 250. 000 miles. Other owner's of 2012 c-250 have experience the came issues. Mercedes benz should take note of possible defected parts.
Check engine light is on and upon quick acceleration the car misfires and begins to shake. Also having water come through top frame when it rains.
Bought car from mercedes lot, used with 70k miles. Delivered it with check engine light. Salesman claimed it was low washer fluid. I said I wasnt going anywhere in a car with a check engine light and he needed to get it back to service and have code ran. After doing so he claimed it just needed to be reset since last service some work had been done(another lie). Told him I was retest driving before accepting vehicle. Turned over 3 times, then started. When driving on the interstate the throttle became unresponsive and died out with cars speeding up behind me. Forced mercedes to put it back in service. It was the timing chain and cam adjuster issue. Theres 100s of people notifying you of this. Mercedes knows and is trying to lie to customers and still sell them knowing they're damaged and dangerous. Fix can be upwards of $4000. A recall needs to be made!!! please do something!.
I bought the certified car at 50k and at 70k miles, right after the warranty ended - check engine light came on and the dealership said it will cost $8k due to camshafts to repair!! they even suggested that I should consider trading the car in! keep in mind I still owe $28k so that option is out! since then the check engine light still on even after I got it repaired at a local/affordable mechanic and it's about 110k mileage and the engine is rattling as it runs. This is my 3rd benz and the first 2 failed due to the transmission failure. I just can't believe these german cars cause so many problems and so costly to repair. What happen to you pay for what you get!!! today, while I was driving the car just slowly stop and the engine cut off! aaa came to check and it's not the battery so will need to get towed. Still owe $10k left- I don't know what to do! no other car to drive .
Sometimes while driving my car it will stutter as if it wants to turn off while driving. Additionally, when starting up the vehicle it stalls before actually turning over. The check engine light came on and the vehicle was taken to a certified mercedes dealership and the diagnostics came back stating a issue with the "camshaft adjusters (internal fault)". Apparently, first generation C250s are having this issue but it has since been corrected with later generations.
Rough start in the morning, check engine light came on. Took it to the Mercedes Benz dealership at buckhead GA. Was told that the cam adjusters not functioning. Estimated repair cost $4000.
On multiple occurrences the vehicle has started to misfire at random times and speeds ranging from 45-70 mph resulting in "limp mode" or a stalling condition. The check engine light comes on, but will not be on when the vehicle is restarted. The dealership on no occasion has been able to duplicate my concern although others have been in the car to witness. I feel very unsafe driving the vehicle as when it stalls on the highway, I lose steering and brakes as well.