Its probably worth noting that there is actually a hell of a lot of adjustability in Audi doors. You can adjust both top and bottom hinges, and the window frame is a separate assembly to the door skin so you can adjust height and angle of that as well. Its very common on older Audis (particularly B5 and C5) for the top rear edge of the frame to need pulling in a little to stop wind noises as it all seems to get a bit slack with age. I've noticed on my D2 that the window rubber has either shrunk or dropped a little as the top corners don't sit right. I've fiddled with it a couple of times, but I think the whole assembly needs to be dismantled and re-assembled to get it back in the right place. Given how much of an arse it is to get the door panels off a D2 I've just put up with it so far.
I do need to treat all the seals as well though so I might give the Wurth product a try
