Huw - If you have a 1990/91 coupe quattro then you should also check the tail light housings. They are sealed to the body with black body goop, and the stuff dries out after a while. You need to take the tail lights off and replace the goop. Check by getting in the hatch with a flash light while someone waters the tail lights. Dave 1990 200 qw (former 1991 CQ owner)