yep i would agree with the above statement!!
since i have had problems with my track alignment but it was more pulling quite strongly to the left never to the centre-line of the road.
When the car is on a level, un-cambered surface the steering will stay straight as a dye if the set-up is correct.
As to moving the sub-frame i would question Audi because that is usually a static frame and should not!! be moved.
All the adjustment should be done on the rear trailing-arm mounts since the rear wheels dictate how the front wheels align, the caster and camber on the rear wheels are fixed non-adjustable.
The caster and camber for the front wheels can be adjusted on the front suspension units themselves.
The maximum camber of the front wheels should be 4 degree toe-in at the top of the wheel this sounds alot but this is the spec for the front wheels.
SO i would take your car back get it sorted and don't take any rubbish from the dealer.
I think then go take it to an independant tyre specialist such as All-Audi or as Shaf said that pro-align.
i had my alignment carried out by Audi under warranty then had it checked by an independant Audi specialist using the old fashioned optical alignment just as accurate may i add!! conclusion A-o.k.
If you are going to get the alignment carried out and it is not under warranty it costs about £150.00 from Audi the optical alignment cost just for the checking about £25.00.
Hope you sort your problem out
Drive Safely!!
[21][?]
Keep in touch let us know of the conclusion.
cheers
andy.
A.D.Simmons