The AUDI A6 (1997-04) 4DR SALOON 2.5 TDI 180 QUATTRO SPORT AUTO is a large, premium four-door diesel saloon, aimed at buyers wanting comfort and space rather than a small, inexpensive runabout. In the UK, it sits in the executive-car class, competing with period BMW 5 Series and Mercedes-Benz E-Class models. The powerful diesel, automatic gearbox and Quattro four-wheel drive give this A6 a distinctive blend of relaxed long-distance cruising and reassuring traction. Its understated cabin and solid, grown-up feel suit motorway commuters, couples or families needing a roomy boot and comfortable journeys. It is less suited to tight-town parking or buyers prioritising low running costs. mycarcheck.com has recorded 14 checks across eight distinct VINs: a modest sample, but useful context. Typical recorded mileage is 139,000, annual use 6,000 miles, and around six previous keepers; average private-sale valuation is £1,200. Check each car’s history and condition carefully before you buy.