 We have the car 2 years now, so far no technical problems.  This is second Mercedes, the first one being an E320 4Matic. We came into the dealer to buy a C240 4Matic, but when my wife saw the 350, she was attracted to it.  The price was very attractive so after a short test drive we decided to go for it.  In retrospect, I kick myself for making such a spontaneous decision. The car is no comparision to the smoothness of the E320. This one feels really like a truck. But my main issues with the car are the engine and the fuel economy. The engine does not feel and sound like a Mercedes engine, it is underpowered and noisy, awful. Fuel consumption is horrible. Never will buy again.