The AUDI A6 (2004-09) 4DR SALOON 2.8 FSI S LINE MTRON AUTO is a premium four-door saloon for drivers seeking space and comfort than a hatchback. In the UK used-car market, it competes with executive models such as the BMW 5 Series and Mercedes-Benz E-Class. S line styling also looks sportier. Mycarcheck.com has recorded 18 lookups covering six distinct VINs, a modest snapshot rather than a large sample. Those checks show an average private-sale valuation of £1,600, recorded mileage of 97,000 miles, annual use of 4,000 miles and three previous keepers. Treat these figures as a guide, since individual cars vary. The automatic gearbox and petrol engine suit relaxed motorway journeys, business travel and comfortable family trips; this is less suited to buyers prioritising low running costs. It offers a refined, substantial feel and more distinctive S line appeal than many rivals, but age and condition matter, so check history carefully.