Can anyone explain what all the numbers mean?? What's this ET all about??? What wheels fit the A3?? Most i've seen are ET43 and ET45?? Which genuine OEM wheels scrub? Some guy on edition 38 forum is selling genuine RS6 wheels (18") because they are scrubbing on his mk5?? Surely the arches on the mk5 golf are the same as the A3 8P?? Why would they scrub?? Don't worry maars still on for those spokes!!