The AUDI A6 (1997-04) 5DR AVANT 2.5 TDI SE is a large, premium family estate rather than a hatchback or SUV. Its long-roof body offers useful luggage space while retaining the comfort and understated image expected of an executive car. In the UK used market, it sits among established alternatives such as the BMW 5 Series Touring and Mercedes-Benz E-Class estate. mycarcheck.com has recorded just one lookup and one distinct VIN for this model, so its figures are a small snapshot, not dependable model-wide averages. For that checked example, the average private-sale valuation was £500, latest recorded mileage was 151,000, annual mileage was 11,000 and the number of previous keepers was two. It suits families, commuters and touring drivers seeking a roomy, comfortable diesel for regular journeys. The Avant’s practical boot and relaxed ride distinguish it from mainstream estates. At this age, condition and service history matter more than badge appeal alone.