For the TQS and other Quattros:
Fronts are M16 and have a 17mm hex drive.
Rears are M14 and have a 14mm hex drive.
FWD 4 cylinder models have M14 bolts up front due to the smaller CV/bearing.
I've always struggled to get the 180degree turn, you get about 90, then theres so much flex in the bar etc that getting the next 90 is really hard.
3/4" drive breaker bar might help, but finding the hex drive sockets in 3/4" drive wont be easy!