At some time or another you may find that your rear electric window(s) stop working. Usually this is due to failure of the pulley system rather than the motor itself. MB tried to improve the situation by redesigning the motor and pulley system as time went by. You are advised to check with your dealer whether your regulator utilizes the old or the new motor engagement, as if it uses the old one then you will need a new motor as well (MB can only supply the new system). This is easily determined from your VIN. Parts: A210 7301646 offside rear regulator - no motor - approx: £70 from MB A210 7301546 nearside rear regulator - no motor. 4x 3/16" Pop rivets. Tools: Pop riveter. 5mm or 3/16" drill bit and drill. Sticky tape. Phillips and flat head screw driver medium size. First we need to remove the door card. This is held in place by 6 pop type clips around left, right and bottom edges; two failrly chunky, phillips screws and a lip along the top edge which clips in by the window rubber. See the picture below.