I think one of the rear wheel bearings has gone on my recently purchased A3, and I decided first of all take the noisy-side rear wheel off and replace it with the space saver just to discount a buckled wheel... however it turns out I dont have the locking wheel-nut bit!!!! Has anyone been in this situation before? What does it cost to get them drilled off? Or can I go to Audi and get them to find out what nut remover it needs and buy one? Any help appreciated!