The AUDI A4 (2001-05) 4DR SALOON 1.9 TDI 115 is a four-door, five-seat family saloon, rather than a hatchback or SUV. It sits in the established premium used-car class, offering a restrained alternative to similarly sized BMW 3 Series and Mercedes-Benz C-Class models. Its understated styling and roomy cabin make it suitable for everyday family duties as well as business travel. The 1.9-litre diesel is best suited to commuters and drivers covering regular longer journeys, with useful pulling power and the potential for economical running when maintained well. Compared with many petrol saloons of its era, the A4’s diesel focus is a clear draw; buyers should still check service history and condition carefully on a car now over 20 years old. Mycarcheck.com recorded 12 look-ups across nine VINs: average mileage was 107,000, annual use 10,000 miles, and owners 2.4; average private-sale valuation was £300 in this limited sample only.