2006 A3 60K - I had the same issue towards the end of last year's warm season. Went through winter since I did not need it. Now it's warming up and no cool air. It came on briefly the other day up until the point where I turned of the car. I have a service appointment next week for this. I will be very disappointed with Audi if it's the compressor and another is waranted. Already changed the battery after 3.5 years.....what's up with that? These items should be lasting longer.