2009 Mercedes B-Class 1.7L Petrol · SA09 WZP

The most recent DVSA MOT test recorded for this 2009 Mercedes-Benz B-Class took place on 26 February 2026 and resulted in a failure with no defects recorded on the official summary, followed immediately by a retest on 27 February 2026 which achieved a pass, again with no advisories or failures listed. The fact that the failure was not accompanied by any categorised defect typically indicates either a refusal to test for administrative reasons, such as a missing or invalid insurance disc at the time of presentation, or that the necessary rectification between the two tests was minor and successfully completed before re-presentation. Looking at the broader pattern, the vehicle has alternated between pass and fail outcomes across consecutive test days in both 2025 and 2026, which suggests a pattern of vehicles being submitted for test with minor outstanding issues that are then addressed promptly rather than indicative of any underlying mechanical decline. Overall, the maintenance trend appears broadly stable, with the vehicle consistently achieving a pass certificate once presented in a fully roadworthy condition. The recorded mileage of 105,067 miles on a vehicle that is now approximately seventeen years old equates to an average annual usage of around 6,180 miles, which is broadly typical for a car of this age and class, and indicates neither the extended periods of standing that can promote corrosion and fluid degradation nor the high-mileage wear that accelerates suspension, braking, and drivetrain component fatigue. There are no significant mileage gaps recorded between tests, with the mileage progression between consecutive MOTs appearing consistent and proportionate to the elapsed time, suggesting that the odometer reading is likely genuine and that the vehicle has been in regular if modest use. This kind of usage profile is generally favourable for mechanical longevity provided that time-based servicing items have not been neglected simply because the annual mileage has not been high. Given the clean MOT record and the absence of any documented advisories, the prospective buyer should focus on age-related deterioration rather than chasing specific component failures flagged in previous tests. The tyres, although they may have legal tread depth, should be inspected carefully for sidewall perishing, cracking, and age-related degradation typical of rubber compounds that have aged beyond six to seven years, as Mercedes-Benz specification tyres often have a production date stamped on the sidewall which should be reviewed. Equally important is a thorough inspection of the brake discs and calipers, as vehicles that see modest mileage combined with the short journeys characteristic of urban B-Class use are prone to corrosion forming on the disc surfaces, binding calipers due to seized slide pins, and brake fluid that may not have been replaced at the recommended two-year intervals given the calendar age of the car. Other practical checks for a vehicle of this age and usage profile should include verification of the 12-volt battery health, as original equipment Mercedes units are frequently beyond their service life at this point and may present early warning signs such as slow cranking or voltage drop under load. The coolant system should be examined for any signs of weeping from the thermostat housing, radiator, or expansion tank, all common failure points on M-Class derived platforms of this era, and the automatic transmission fluid and filter should be confirmed as having been serviced in line with Mercedes-Benz intervals, as neglected gearbox fluid leads to harsh shifts and eventual mechatronic issues. During the test drive, listen for any clonks or creaks from the front suspension over speed humps and uneven surfaces, which would suggest worn lower wishbone bushes or anti-roll bar drop links, monitor for any pulling to one side under braking that could indicate a binding caliper, and ensure that the climate control functions effectively, as failed auxiliary drive belts and worn compressor clutches are common items that would not necessarily appear in an MOT but are important indicators of overall mechanical condition. Finally, confirm the presence of a complete and stamped service book, as a well-documented history from a Mercedes-Benz specialist or independent German vehicle garage will carry far more reassurance than the MOT record alone for a car now entering its eighteenth year.