The AUDI A6 (1997-04) 4DR SALOON 2.5 TDI 180 QUATTRO SE TIP AUTO is a large, premium four-door saloon, aimed at buyers wanting comfort and space rather than a small city car. Its diesel engine, automatic gearbox and four-wheel drive give this older A6 a distinctive mix of relaxed touring ability and confident grip, making it a practical alternative to executive rivals such as the BMW 5 Series and Mercedes-Benz E-Class. That combination suits commuters covering motorway miles, families needing a roomy cabin and boot, or drivers seeking an affordable, comfortable long-distance car. SE trim feels upmarket, while quattro traction is a notable advantage in poor weather. Buyers should remember that age and condition matter greatly, and a thorough history and mechanical inspection are important. In a small sample, mycarcheck.com records five look-ups across three VINs: average private-sale value £900, mileage 140,000, annual mileage 16,000 miles and 5.2 previous keepers. These figures offer a snapshot, not a reliable market-wide guide.