The AUDI A6 (1997-04) 5DR AVANT 1.8T QUATTRO SE is a large premium estate with useful load space. Its understated design and comfortable cabin suit families and frequent travellers needing room for luggage or hobbies. Turbo petrol power and four-wheel drive give it useful all-weather appeal. In the UK used market, it is an executive estate rival to BMW 5 Series Touring and Mercedes-Benz E-Class estates. Quattro all-wheel drive adds confidence in poor weather, and the Avant body is more versatile than a saloon. It suits buyers valuing comfort and practicality over newer technology and economy. mycarcheck.com has recorded just four look-ups across three distinct VINs, so figures are indicative rather than broad market averages. Those checks show an average private-sale valuation of £700, mileage of 143,000 and 7.5 previous keepers; recorded annual use averages 2,000 miles. Treat these figures as a snapshot, and inspect condition and service history before buying.