The AUDI A6 (1997-04) 4DR SALOON 2.5 TDI 163 is a large, four-door executive saloon, offering a comfortable, understated alternative to a family hatchback or SUV. In the UK it competed with the BMW 5 Series and Mercedes-Benz E-Class, with roomy accommodation and a relaxed, long-distance character. The 2.5-litre diesel is suited to motorway journeys and regular commuting; the cabin and boot also make it practical for family trips or business travel. This A6 is best for buyers seeking a substantial, comfortable used car, rather than a small first car. Its appeal is space, refinement and long-distance ability, though age and condition deserve careful attention. mycarcheck.com has one lookup for this version, covering one VIN, so the figures are only a snapshot. The check showed an average private-sale valuation of £200, 124,000 miles, 18,000 annual miles and one previous keeper. Check each car’s history and condition carefully before buying one yourself.