Im in the same boat, been told I need to replace all discs and pads.
Thinking I may as well upgrade to s3 fronts.
Would it matter if I just left standard audi rear discs & pads and for the 345mm fronts either do brembo max grooved or mtec grooved , along with s3 calipers/carriers/pads?
I've been trying to find the answer, but when I replace the calipers, would I need new hoses too? I currently have a 2.0 TDI quattro.