I just had some new wheels fitted to my 98 A3 1.8T & am unsure as to what the correct tyre pressures are. The old wheels were the standard 16" ones but the new ones are 9 spoke 18" RS4 - 225/40/ZR18. I believe it was possible to spec these wheels on the old model S3 so there must be pressures quoted for them somewhere by Audi - Can anyone help out???