2009 Mercedes B-Class 2.0L Diesel · WF09 FVG

The vehicle most recently passed its MOT on 28 January 2026 with no defects or advisories recorded, marking a clean return to form following earlier advisories. Looking back through the recorded history, the overall maintenance trend appears broadly stable. A single advisory was issued in February 2025 concerning a corroded brake pipe on the nearside between the rear and front, masked by grease or other material, while the most recent test cleared this concern. The only failures in the record are isolated and minor in nature, relating to headlamp beam aim in early 2024 and non-functional washer and side repeater items in early 2023, all of which were rectified at the same test or shortly thereafter. There is no pattern of recurring structural, braking, or suspension failures, which is reassuring for a vehicle of this age. With a recorded mileage of 34,585 miles across approximately 17 years, this B-Class has covered an average of around 2,034 miles per year, which is exceptionally low. Such modest usage suggests either predominantly short urban journeys, long periods of standing between use, or careful occasional driving. The MOT records support this picture, as each annual test falls within the same February window with broadly consistent odometer readings rather than significant mileage accumulation. Lower annual mileage of this nature reduces wear on drivetrain and braking components through use, but it places greater emphasis on age-related degradation, including corrosion, fluid deterioration, and the condition of rubber and polymer components that fail through calendar ageing rather than mechanical wear. Given the low mileage and the vehicle's age, a prospective buyer should pay particular attention to items that degrade with time rather than use. Tyre sidewalls should be inspected for perishing or cracking from age, even if the tread depth appears adequate, and the manufacturing date code on each tyre should be checked to confirm they are not excessively old. The 12V battery is a known concern on low-mileage cars that have stood for extended periods, so its age and state of charge should be verified, and a load test is advisable. Brake discs and calipers can suffer from corrosion and seizure when a vehicle is infrequently used, so the calipers should be checked for binding, the discs examined for surface rust or lipping, and a firm brake pedal feel confirmed during the test drive. Brake fluid, coolant, and transmission fluid should all be confirmed as having been replaced on a time-based schedule rather than purely mileage intervals, as these degrade chemically over time. On the road, listen carefully for any suspension clunks or knocking over uneven surfaces, which would indicate worn bushes, top mounts, or coil springs, all of which are susceptible to age-related deterioration on a Mercedes-Benz of this generation. The 2025 advisory regarding a corroded brake pipe warrants physical inspection underneath the vehicle, particularly along the nearside underbody where salt and moisture collect, to confirm that the protective grease coating has not worn away and that no active corrosion or weeping is present. During the test drive, monitor for any pulling to one side under braking, suggesting a binding caliper or uneven pad wear, and observe the dashboard for any warning lights relating to emissions, ABS, or the electronic stability programme, as these systems can develop faults through disuse. A thorough underbody inspection for structural corrosion, paying particular attention to suspension mounting points and sill seams, is strongly recommended given the vehicle's age, and verifying full service history with stamped evidence of annual or biennial maintenance will provide confidence that time-based servicing has not been neglected during its long periods of low use.