One problem related to fuel hoses lines/piping and fittings has been reported for the 2005 Mercedes Benz C230. The most recently reported issues are listed below.
My Mercedes Benz C230 kompressor started having problems at 4400 miles, it has a hesitation problem. It now has 42,000 miles and still has hesitation. Its been in the shop 7 times for the same situation. They tried to blame it on water in the fuel, but it continues to have the same issue. Over the seven attempts to repair my vehicle, the problems still persists. The hesitation is consisted of stopping and going, jerking the vehicle when transmission from gear to gear. Its a fuel related problem. My fiance and I have been in to many close calls with accidents. The scare of my car is if I really need to avoid being in a accident with swerving, will I have the ability to do that? right now I don't. They have replaced the throttle body, fuel sensors, fuel pump, can't use premium gas recommended by germany tac line, a lot of carbon build-up in the fourth cylinder, gas tank and I think that's it.