The AUDI A6 (1997-04) 5DR AVANT 2.5 TDI SPORT 163 MTRON AUTO is a large, premium diesel estate, known in Audi’s range as an Avant. It sits above family wagons in comfort and finish, offering generous space for passengers and luggage rather than the compact size or running costs of a city car. mycarcheck.com records 90 look-ups covering 15 distinct VINs, giving a useful snapshot, though not a huge sample. The average private-sale valuation was £1,700, with average recorded mileage of 177,000 miles and annual mileage of 12,000. Cars checked had five previous keepers on average, so condition and maintenance history deserve close attention. This A6 Avant suits families and commuters seeking space, comfort and automatic convenience. Its estate body is practical, while Sport trim adds a purposeful feel. Against BMW 5 Series and Mercedes-Benz E-Class estates, it is a refined alternative, but age and mileage call for careful checks.