Capra
Senior Member
- Joined
- Jan 27, 2018
- Messages
- 3,320
- Reaction score
- 1,197
- Location
- Gloucestershire
- Your Mercedes
- W204 2013 C350 CDI Pan roof
This started out of the blue, when the drivers side window is lowered it is making a strange knocking sound. It is booked in for a service soon, but just wondered what inside could be the cause, it only does this during the lowering movement.