The AUDI A4 (2008-12) 4DR SALOON 2.0 TDI 120 S LINE is a premium, four-door family saloon, sitting between mainstream models such as the Ford Mondeo and pricier executive choices. Its smart, understated styling and S line trim give it a sportier look while keeping the practical boot and comfortable cabin expected of an everyday car. Mycarcheck.com records show 315 look-ups covering 110 distinct cars, a useful sample of interest in this used Audi A4. Checks indicate an average private-sale value of £3,100 and average recorded mileage of 146,000 miles; typical annual use is 9,000 miles. The cars had nearly five previous keepers on average, so condition and service history can vary considerably. It suits commuters and families seeking comfort and premium feel. The diesel is geared to economical motorway driving, while S line adds sportier looks. Compared with BMW 3 Series and Mercedes C-Class rivals, the A4 feels refined, understated.