NHTSA Complaint #11430663 — 2012 MERCEDES-BENZ C250

I purchased this 2012 C250 Mercedes from Carmax of Waldorf on 04/26/2017, with 20,046 miles on it. I informed Carmax the engine light was on and the car was rattling at start. I also reported the oil dipstick was broken. When the car was returned, the dipstick was replaced, coolant light off and engine light was off; however, the rattling at start up continued. I reported the problem to Carmax several months later and they pretty much denied fault and went as far to say the car is just cold and does that at startup. For further protection I signed with carshield as my wife drives the car. The car's rattling continued at startup and eventually became difficult to start. I took it to Mercedes of Arlington, Virginia and they stated the timing gear and chain needed replacing. carshield reported back to me that it was a preexisting problem and wouldn't fix it. Meanwhile, we were stuck with a car we were paying on with no one taking the blame. Following research, I found that this is a recurring problem with the 2012 C250 model but there is no recall. I eventually paid approximately $5000 for the engine to be repaired as the engine failed. The engine is currently rattling again; with the engine light coming on constantly. this seems to be a common problem, however, with to consequences and accountability.