My biggest problem with the car is, whenever it rains the floors in the car are wet. I can't locate where the leak is originating from. When it is raining you can see a wet spot along the lower floor area next to the factory speakers on both sides of the floor area. Over time "say 1-2 hours of rain" you can see the build up of water along the rear foot area.
HELP...
Over all, it's been an OK car. (great second car) Wouldn't recommend it as a daily dependable driver.
My biggest peeve about the car... NO cup holders.
I had a similar problem recently with my Mazda. Car started leaking into the passenger foot well area after having windshield replaced. I thought it was bad sealing of the new window, but it turned out to be water leaking through the ventilation intake. The force of removing the old windshield opened up a seal in the water channel under the windshield (where the vent intakes are) that had become a bit rusty. I painted the seal with thick rust-proofing paint and have had no problem since. Mind you, I had to remove three different items to get to it. I don't know how hard an Audi would be to get to. Good luck.