The AUDI A4 (2005-08) 4DR SALOON 2.5 TDI 163 S LINE is a spacious, four-door premium family saloon, competing with the BMW 3 Series and Mercedes C-Class in the UK used-car market. Its smart, understated styling and S line trim give it a sportier look than a typical family car. mycarcheck.com has recorded 24 look-ups covering 17 different VINs, so the sample is useful but modest. Across these checks, average recorded mileage is 141,000 miles and average annual mileage is 6,000. The average private-sale valuation is £1,000; cars had nearly seven previous keepers on average, suggesting ownership histories deserve close checking. Its diesel engine and comfortable cabin suit commutes and motorway trips, while four doors and a useful boot help small families. S line styling adds visual appeal; against rivals, the A4 is known for its refined cabin. At this age, check condition, service history and vehicle history carefully before buying.