New owner of an 2009 A5 Quattro. I noticed a few stains on the roof of the car and after looking at several other posts discussing water issues... I have confirmed that the rear sunroof drains on both sides of the car are clogged. I have not been able to find info on where the drains run and exit the car. Any direction would be appreciated.

 

Ok folks - on a suggestion from a friend I tried a little compressed air which was successful. The drains exit right in front of the rear tire well. The air blew out all of the gunk quickly!!!