Herewith the facts of the matter!
205/40/17s have a rolling radius of (17 x 25.4/2) + (205 x 40/100) mm
which is 298mm
Standard size of 195/50/15 have a rolling radius of (15 x 25.4/2) + ( 195 x 50/100) mm
which is 288mm
Difference of 10mm less, so it should improve clearance if anything. If it is rubbing on anything now, then to be fair, 10mm increase from standard should make no difference at all - I would therefore suspect some Herbert has had the suspension lowered, or your shocks are completely shot, or a spring is unseated/cracked somewhere... look at it from the front - does it lean?
Personally I am in no position to argue with VW who have spent squillions on R&D to debate about trye sizes. Stick to standard good quality tyres. They will last infinitely longer, give a much better ride, will not add to unsprung weight like your current over sized Audi rigger boots and will not invalidate your insurance....always one to think about there...