Legislation now makes it OK to have your car seviced to manufacturers specification at a garage of your choice without effecting the warranty. However you must be careful because Audi offer a 3 year warrany but the third year is given by the dealer and not the manufacturer. So, if you dont have the car seviced by them, they are not obliged to give you the third year cover. Clever huh? I suspect its only Audi who do this, but please check before you buy, just who provides the warranty.