The AUDI A6 (2011-15) 5DR AVANT 3.0 TDI V6 DPF SS 204 EU5 S LINE MTRON AUTO8 is a premium, five-door estate and spacious executive car. In the UK used-car market, it sits among large, comfortable family and business cars, with Audi’s smart styling and S line appeal. Mycarcheck.com recorded 379 look-ups across 127 different VINs, a substantial sample. Across those checks, the average private-sale valuation was £7,000; average recorded mileage was 122,000 miles, with about 8,000 miles added yearly. Cars averaged around three previous keepers, so checking each car’s history and condition is worthwhile. The A6 Avant suits families and commuters needing luggage space without sacrificing a comfortable motorway ride. Its V6 diesel and automatic make trips relaxed, while the estate offers practicality over saloon rivals and S line trim adds appeal. It rivals the BMW 5 Series Touring and Mercedes-Benz E-Class estate; check service history and running costs.