did you ever get to the bottom of your problem ,

 

I've had the same problem.

303 motorsports - 2 new keys $500, then they said "key reader" has to be ordered from Germany $500.

$1000, problem eactly the same.

Took it to Prestige Audi...key reader they say. When I told them it was new, the mechanic gulped and said it had to be because the code reader told him it was.

$1500 later, I am sitting at home depot - car won't start.