One problem related to door has been reported for the 2008 Mercedes Benz C300. The most recently reported issues are listed below.
Ltr fad fm (in) fm owner of a 2008 Mercedes Benz C300 re defective rear door locking knob, the plastic locking knob came off while unlocking the door manually but the door did not unlock, reply attn. Darlee mccollum, DC ofc (envelope only).