Yes, and I don't think this is an accident, since the A5/S5 wheel offsets are very low compared to other Audis, more like a very aggressive RWD car. I haven't done the calculations, but I'm almost positive that Merc SL wheels will clear just fine, and even have room to grow. My calculations show that a 10" wide with ET27 will clear the rear on the A5/S5, and that's more aggressive than any non-widebody Mercedes I've done fitment on.Yes, it's 66.56mm to be exact (same size as Mercedes).