The AUDI A6 (2008-11) 5DR AVANT 3.0 TDI CR DPF EU5 240 QUATTRO S LINE is a large premium estate, designed to combine executive-car comfort with the load space of a family wagon. In the UK used market, it sits above mainstream estates, competing with BMW 5 Series Touring and Mercedes-Benz E-Class Estate models. mycarcheck.com records are based on 15 look-ups covering eight different VINs, so they offer a useful snapshot rather than a huge sample. The average private-sale valuation is £2,900, with recorded mileage averaging 167,000 miles and annual mileage 16,000. Cars checked had averaged almost four previous keepers in this sample overall. Its 3.0-litre diesel, quattro four-wheel drive and S line trim make it a confident, brisk tourer, especially in poor weather, while the Avant body suits family holidays, commuting and carrying kit. It feels more substantial and sure-footed than rivals, but check service history and condition at this age and mileage.