replacing upper control arms/passenger side on 1999 Audi A4 Quattro

we just had 4 new tires put on and had the shop go ahead and do a 4 wheel alignment to prevent premature wear on a brand new set of tires!!unfortately they found that the uppr control arms were loose,to the point they couldnt correctly align the front end.i have heard some horror stories of a "frozen" or siezed bolt in the pinch bar part of the assembly,ANY hints,tips,advice to help me get through this smoothly will be very much appreciated..and i send thanks to all.

Asked by for the 1999 Audi A4 Quattro
Yes there rite ,u gotta have it done ,it use to be expensive ,thats why people dumped Audi and just bought jettas ,Hondas ,etc.
When I did upper control arms it was 750.00$..