These tires are unbeatable for winter driving, Nokian Hakkapeliitta Q in a 205/55/R16. Rims are original 1999 A6 rims, according to the Ronal wheels site, the following cars have the same 5x112 bolt pattern.
Audi A3
A4/S4 (B5)
A4/S4 Sedan (B6)
S4 Avant (B6)
A4 Sedan (B7)
S4 Sedan (B7)
Avant...