The AUDI A6 (2004-09) 4DR SALOON 2.0 TDI 140 TDV S LINE MTRON AUTO is a spacious, premium family saloon rather than a hatchback or SUV. In the UK used-car market, it sits among executive choices, offering Audi badge appeal and a comfortable, refined feel for longer journeys. As an S line model, it adds a sportier appearance to a practical, understated design. Mycarcheck.com checks recorded 1,113 look-ups across 474 distinct VINs, a sample for this model. The average private sale valuation was £1,400, while the average most recent recorded mileage was 142,000 miles. Average annual mileage was 8,000 miles, and checks showed an average of 6.4 previous keepers. These figures suggest checking service and ownership records is especially worthwhile for buyers. It’s typically suited to commuters and families wanting space, an automatic and relaxed motorway comfort; compared with the BMW 5 Series and Mercedes-Benz E-Class, it offers a restrained, well-rounded alternative.