I own a 2011 Mercedes Benz E250 CGI W212 Coupe (4 cyl gasoline turbo) with 26,000 genuine miles. I have owned the car since new. The car is serviced every 12 months by the Mercedes Benz dealership the car was purchased from. Up until now I have had zero problems, the car has been super reliable. However for the last two months, every morning, after the car has been sitting overnight in the undercover car port, the car starts well but when I start driving for the first 60 seconds, the acceleration hesitates as though the engine is starved of fuel. This also happens in reverse gear. After 60 seconds the problem goes away and the car drives well for the rest of the day with no further issues. There are no error messages on the dash board and the code scanner shows no error codes. I took the car to my local Mercedes Benz dealer and they replaced the ignition coils but the problem returned. I then took the car to a local independent Mercedes Benz specialist mechanic and he replaced the park plugs which had lots of carbon build up, but the problem returned. Both mechanics kept the car for three days. Has anyone else had this issue and resolved the problem? Thanks.