I have been having issues with my vehicle since I purchased it. Starting with me not having enough power from a start, in an attempt to gain enough power to drive at a safe speed from the start, as if the vehicle lags & no matter the gasoline or service, the problem never corrects. When I'm trying to gain speed to maintain with the flow of traffic safely the vehicle lags notably before gaining speed. I'm now having to replace the engine bc the oil coolant hose burst while I was driving on the highway with my child in the car. My check engine light activated but the only notice displayed on the dash was the engine coolant when it was low. When the hose burst while I was driving about 60mph I heard a pop sound under the hood, saw smoke coming from the exhaust, then a clanking noise under the hood that got louder & louder until I was able to pull off of the highway, & then I noticed a very large amount of oil on the ground that left a trail along the ground from my vehicle. That was very dangerous as my vehicle lost power during that incident. I'm told by the mechanic, the engine has to be replaced. This happened without a warning. The Mercedes Benz is supposed to be a safe & reliable luxury vehicle & not a nightmare to have for the owner.

- Mullins, SC, USA

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.

- Greensboro, NC, USA

The cel came on and the engine was having a rough start. I took it to the repair shop and after using the star diagnostic system the diagnoses was camshaft adjusters in failure. The remedy replace the camshaft adjusters. Cost $3500.

- Marietta, GA, USA

This was not an accident, it is, in my opinion, a possible safety problem with the vehicle - turbo lag; throttle lag; transmission lag. I almost had two accidents due to the lag problems, and have attached a more detailed analysis for your review. Turbo lag: This is the time it takes for the car to go from its naturally aspirated power to the full power of the car at full boost/ peak boost is reached relatively low in the reverse range, but it is not instantaneous power like a naturally aspirated engine. Throttle lag: The drive by wire system has a bit of lag. Under certain conditions, I measured it at.2 of a second or so. Whatever the value, there is always lag there, and we are very sensitive to it. However, driving ins mode vs E mode does make somewhat of a difference. Nonetheless, the car always starts out in E mode when I get in and start the car. We didn't purchase the car to always drive in S mode. Transmission lag: This I notice significantly and it is, in my opinion, probably the most annoying to me. You'll notice this when stomping the pedal to the floor and then doing the wait... wait... wait.. downshift. Even if this engine was running only on its naturally aspirated four cylinders, the transmission should respond immediately to a sure footed stomp to the floor with the quickness, as does my four cylinder rav-4. however, the mb C-250 does not! in my opinion, you can reset the tcu all you want, the delay will remain.

- Indian Land, SC, USA