AUDI A6 (1997-04) 4DR SALOON 2.5 TDI 180 QUATTRO SE is a large executive saloon offering spacious comfort for families. In the UK it competes with BMW 5 Series and Mercedes-Benz E-Class models, appealing to buyers seeking relaxed cruising and a roomy interior. Quattro four-wheel drive and the 180 diesel suit motorway commuting, long trips and wet-weather travel. Its roomy cabin and boot make the A6 practical for families, and its comfortable ride suits business-mile drivers. It is less suited to those seeking modern-car economy, and age makes condition and service history important. mycarcheck.com records just three checks across three VINs, so this is a small snapshot, not a broad market guide. In that sample, average private-sale valuation was £700; average recorded mileage was 181,000 miles, annual mileage 8,000, and previous keepers 4.3. Against BMW and Mercedes rivals, the A6 is notable for diesel pulling power and all-weather traction; inspect condition carefully.