The AUDI A4 (2001-05) 4DR SALOON 2.5 TDI 163 SE MT AUTO is a four-door, premium family saloon: a more grown-up alternative to mainstream hatchbacks, aimed at buyers wanting comfort and a smart, understated image. Its SE trim and strong diesel engine make it suited to longer journeys as well as everyday driving. In mycarcheck.com usage data, this model has 16 look-ups covering eight distinct VINs, so the sample is modest. Those records show an average private-sale valuation of £500, average most recent recorded mileage of 109,000 miles, and average annual mileage of 2,000 miles. The cars had an average of just over six previous keepers; these figures describe checked examples, not every A4. Compared with BMW 3 Series and Mercedes C-Class rivals, the A4 is known for restrained styling, a solid cabin and relaxed motorway manners. It suits commuters or families seeking a used diesel, though buyers should check condition and service history.