The AUDI A6 (1997-04) 5DR AVANT 1.9 TDI 115 SE is a large, five-door estate car, combining executive-car comfort with useful carrying space. In the UK used market it sits above mainstream family estates, offering a more upmarket alternative for buyers who need room for passengers, luggage or everyday work. Mycarcheck.com has only four look-ups for this version, covering two distinct cars, so its figures are a small snapshot rather than a market-wide guide. Those checks show an average private-sale valuation of £500 and recorded mileage of 160,000; annual use averages 9,000 miles, with around two or three previous keepers. The 1.9 TDI diesel suits commuters and families needing space; the Avant estate is more practical than the A6 saloon. Its comfortable ride, generous boot and fuel-conscious character made it a rival to BMW 5 Series and Mercedes-Benz E-Class estates, though age and mileage make careful checks essential before buying.