I have the A6 Avant and was a bit of trouble to link, but i followed Audi manual and have no problems with link. One thing though is only get to look at phone book, last dialled calls and received calls are not shown up on Audi mmi display.
Took me ages to get it to work in my A5 (Samsung was working fine). Gave up and upgraded firmware on the phone, came back a few days later, problem solved!
Audi bluetooth problem
