The AUDI A6 (2004-09) 4DR SALOON 2.7 V6 TDI 180 S LINE MTRON AUTO is a large, four-door premium diesel saloon, aimed at buyers wanting more space and comfort than a family hatchback. In the UK used-car market, it sits alongside executive rivals such as the BMW 5 Series and Mercedes-Benz E-Class, offering a smart, understated alternative. Mycarcheck.com records 147 look-ups covering 71 different VINs, giving a useful snapshot of interest in this age-and-model combination. The average recorded mileage is 174,000 miles, with annual use averaging 6,000 miles; the average private-sale valuation is £1,100. Check each car’s history and condition carefully, as these figures describe the sample, not every example. Its V6 diesel and automatic suit commuters and families seeking relaxed motorway travel, while S Line trim adds a sportier look. Running costs and age-related repairs matter, and the sample averages 6.6 previous keepers, so inspect service records before buying carefully.