The AUDI A6 (1997-04) 5DR AVANT 2.5 TDI SPORT 163 is a large, five-door estate, known as an Avant, rather than a hatchback or SUV. It sits in the older premium family-car market, offering generous passenger space and a useful load area for everyday duties, holidays and larger shopping trips. mycarcheck.com has recorded just three checks, covering three different VINs, so these figures are a small snapshot rather than a guide to every example. Those checks show an average private-sale value of £900 and recorded mileage of 175,000; average annual use was 4,000 miles, with about five previous keepers. Its 2.5 TDI diesel and Sport trim make it a long-distance companion, suited to families, commuters and anyone needing estate practicality. Compared with the BMW 5 Series Touring and Mercedes-Benz E-Class Estate, the A6 is known for its style, roomy cabin and relaxed cruising; age and mileage make condition checks especially important.