The AUDI A6 (2004-09) 4DR SALOON 3.0 TDI QUATTRO SE TIP AUTO is a premium four-door saloon, aimed at buyers wanting more space and comfort than a family hatchback. It sits among executive cars such as the BMW 5 Series and Mercedes-Benz E-Class, offering an understated alternative for UK roads. Mycarcheck.com recorded 596 look-ups across 281 different VINs, giving a useful snapshot of interest in this older A6. Checks show an average private-sale valuation of £1,200 and average recorded mileage of 138,000 miles; typical annual use was 7,000 miles, with around five previous keepers on average in the sample overall. Best suited to drivers covering longer journeys, or families wanting comfort and space, this diesel saloon is refined rather than a small runabout. Quattro four-wheel drive and automatic transmission bring reassuring, relaxed progress, while the A6 is known for its solid cabin and composed feel. Check age and running costs carefully.