So, it's not been a great start for my Audi owning days. First get the oil-sludge problem, now discover I have a leak in the roof. That'll teach me to buy private. The leak is very slow, as I've said in another post, if you left it overnight in torrential rain in the morning there would be no more than a thimble's worth of water. The problem is not present at all if driving along in the rain, which leads me to think it's a slow 'seepage' type leak caused by standing water pooling somewhere. In fact it doesn't bother me at all, with the air-con on the water dries out within a matter of minutes, but the missus doesn't like drips of cold water in the morning! It drips from the passenger corner of the plastic interior cover along the front edge of the roof. I've inspected the rubber seal along the exterior front of the roof and it looks fine, greening a little bit in places, but generally sound. I've also had a close look at rubber rain catcher on the top of screen pillar and it too looks to be in great condition. Anyone had any experience of such a problem? Any ideas what it might be? I read on another forum that a similar problem was solved simply by the dealer 'tightening' the roof, anyone got any idea what that means? Also generally, what products do people use to keep the roof in tip-top waterproof condition? Thanks. Seb.