I have a 2002 C230K Sport Coupe.

The convenience opening feature (windows and sunroof) for the drivers side stopped working. The infrared sensor still works though as I can still lock and unlock the vehicle from the drivers or passengers side. I tried reprogramming the key, checked batteries, all OK. Convenience opening/closing still works on the passenger side though. Any idea what could be causing this and if there is any other way to try and fix it myself?

Bought the car used as an MB lease return. It looks immaculate but looks arent everything as this is the THIRD minor problem to go wrong with it in the past five weeks since I bought it! First the sunshade got jammed. Then the electric arm for the climate control system broke. I cant wait to see how much that one will cost for repair.. kinda dissapointed.

Thanks in advance for the help!