I got my 2006 a3 in November and 4 new tyres were fitted by them as part of approved used. Couple of old ones had bulges an one worn. Because quattro they replaced the 4. But I checked them recently and the whole inside tread is almost gone. It's not my drivin as still loads of tread elsewhere. Therefore Im guessing it's the tracking. Audi said they will sort this bit where do I stand with my tyres? Nearly need new ones already!!! Should they cover the cost?