Yet more problems with my 2003 A3 Sport, this time the drivers seat mechanism. Lifting the lever tips the backrest but does not disengage the squab, pile of plastic bits on the rear floor mat. Local dealer says its not a common problem but keeps the replacement parts in stock... Anybody else had this problem ? Also just needed a new radiator, not what I expected after 2 years and 20K miles (Audi Assist very helpful). Great car, just keeps falling apart.