There is a car club for Audis and are very big in N. Virginia and DC area. Try going to : www.quarttroclubusa.org and if no help I've got some names up in the area as they put on driver ed events down here at VIR. I know of one big shop there that does many Audis. Send me an email directly and I can get you the info.

Good luck,
Tobias MB
4 MBs