The AUDI A6 (2004-09) 5DR AVANT 2.0T FSI 170 S LINE MTRON AUTO is a large premium estate, offering more luggage space than the A6 saloon while remaining comfortable and smart-looking. In the UK used-car market, it sits among family-focused executive cars, rivaling estates such as the BMW 5 Series Touring and Mercedes-Benz E-Class. Mycarcheck.com records 37 look-ups covering 22 distinct VINs, a useful snapshot rather than a huge sample. The average private-sale valuation is £1,400, with average recorded mileage of 137,000 miles and around 5,000 miles driven annually. The checks also show an average of nearly six previous keepers, so reviewing each car’s history and condition is especially worthwhile. Its turbocharged petrol engine and automatic gearbox suit relaxed journeys, while S line trim brings a sportier look. This A6 Avant is best for families and commuters seeking space, comfort and prestige, provided they check upkeep, service history and gearbox condition carefully.