Sounds like a clogged valve body, hopefully nothing major.

 

Update -

I had the tow truck take my car to a reputable Audi shop in Portland, and after letting them keep it for two days they called and said there was nothing they could do for me. They think its an electrical part associated with the gear selector but that would automatically cost me $1300 for the part with no guarentee of that fixing it. He recommended I take it to the dealership. "Side Rant" I had it towed using my Geico insurance. So I called and told them I needed to have it removed from that shop and taken to the dealer because they were unable to fix it. She then tells me, "We don't cover that, if it were fixed by the shop and broke down again you would be able to use your tow coverage but we won't take it from one shop to another." What BS !!!! Now I have to pay the shop for diagnosing and for a tow truck to take it to the dealer. So I just shelled out $200 for nothing. The A4 is now on its way to the dealer............................................ ......[:@]