I've just picked up an X-reg A3 1.8T Quattro from a dealer. Looking through the manual it says
"On vehicles with 4wd all 4 wheels must always be fitted with tyres of the same type, make, and tread pattern, so that the drive system is not damaged as a result of constant differences in the wheel speeds"
Mine's got (newish) Pirelli P6000 tyres on both front and one rear wheel, with a (more worn) Michelin Primacy on the other rear wheel. (All 205/55 R 16 91W)
Is this a problem?
Thanks for any advice, Reg