I am looking for a 2001 2.5TDi quattro, either a multitronic or tiptronic gearbox and was wondering if there is anything I need to lookout for. Is the Multitronic worth having or should I go for the tiptronic (manual is not an option)? Any defects, major problems or recalls that I need to be aware of with this model? Is the 2.5TDi worth having over the 1.9TDi? What's the 2.5 TDi like in terms of reliability and longevity? Up until not I have owned older (B4 and B5) petrol Audis. I do mostly mixed motorway and town driving.