The AUDI A4 (2005-08) 4DR SALOON 2.5 TDI 163 SE MTRON AUTO is a premium four-door family saloon, aimed at buyers wanting more comfort and polish than an ordinary small car. In the UK used market, it sits alongside the BMW 3 Series and Mercedes C-Class as a smart, practical everyday choice. Mycarcheck.com records 13 look-ups, covering 13 different cars, so the sample is useful but modest. These checks show an average recorded mileage of 132,000 miles and annual use of 17,000 miles, suggesting many have worked hard. The average private-sale valuation is £1,000, while the average keeper count is about six. Its diesel engine and automatic gearbox suit commutes and motorway trips; the saloon boot takes family luggage. SE trim adds comfort, while relaxed cruising sets it apart from BMW 3 Series and Mercedes C-Class rivals. It suits buyers after an affordable used Audi, but check condition and service history carefully.