2015 Mercedes-Benz B-Class 1.5L Diesel · AF15 LZL

The most recent DVSA examination on 8 September 2025 resulted in a PASS, although this outcome must be viewed alongside a failed attempt recorded on the same date. The failure was attributed to a Major defect concerning the offside front upper anti-roll bar linkage ball joint dust cover, which was no longer preventing the ingress of dirt, while two advisories for a thin offside rear outer brake pad and a nearside front outer tyre cut were carried over. The presence of a Major defect on the same day as the pass indicates that a repair was undertaken immediately prior to or following the failed test, allowing the vehicle to achieve pass status. Looking at the broader pattern across the 2023 to 2025 period, the maintenance trend shows some signs of deterioration. The 2023 test was a clean pass with no advisories, whereas the 2024 and 2025 tests have featured a mixture of bulb failures, brake pad wear, tyre deterioration, and now a suspension component defect, suggesting that the vehicle is reaching an age and mileage where multiple consumable and wear-related items are requiring attention in closer succession. With 121,649 miles recorded on a 2015 vehicle, the annualised mileage works out to approximately 11,059 miles per year, which is broadly typical for a car of this age and consistent with regular mixed-use driving rather than predominantly short journeys or extended periods of standing. There are no significant gaps or unusually rapid accumulations evident within the MOT record provided, which is generally favourable from a mechanical wear perspective as it implies consistent operation of the drivetrain, brakes, and suspension components. Sustained use of this nature typically allows the engine, turbo (if fitted), and exhaust system to remain in good working order, while preventing some of the issues associated with long-standing vehicles, such as seized brake calipers, dried seals, and flat-spotted tyres. Given the recurring nature of advisories relating to brake pads, tyre condition, and the recent anti-roll bar linkage defect, a prospective buyer should undertake a thorough physical inspection and test drive. The offside front upper anti-roll bar linkage ball joint dust cover failure suggests that the anti-roll bar drop links or bushes on the front axle may be approaching the end of their service life; on a test drive, listen for clonking or knocking noises from the front suspension when traversing speed bumps, potholes, or uneven road surfaces, and pay particular attention to any vagueness or shudder through the steering wheel during direction changes. The brake pad advisory for the offside rear indicates that pads are nearing replacement, and any uneven braking effort or a binding sensation after release should be noted, alongside checking for any scoring or lipping on the visible edge of the rear brake discs. Both rear tyres were flagged for perishing or cracking in 2024, and a nearside front tyre has shown cut damage, so all four tyres warrant close inspection for sidewall cracking, tread depth, and any uneven wear patterns that may point to suspension geometry or tracking issues, particularly given the inner edge wear previously noted on the offside front. Beyond the recorded defects, the age and mileage of this B-Class warrant consideration of several time-based service items. A 2015 vehicle will likely be due for brake fluid replacement, as this is typically required every two years regardless of mileage, and the condition of the coolant, automatic transmission fluid (if applicable), and engine oil should be verified against the manufacturer's service schedule. The 12V battery is also a common failure point on vehicles of this age and should be tested for cranking strength and state of charge, particularly as Mercedes-Benz vehicles of this era are fitted with a range of electronic systems that place steady parasitic load on the electrical system. Given the previous failure of the nearside headlamp on both dipped and main beam, along with the nearside stop lamp, it would be prudent to confirm that all exterior lighting is functioning correctly and that the bulb holders and associated connectors are free from corrosion. Finally, the underside of the vehicle should be examined for any signs of fluid leakage from the engine, transmission, or power steering systems, and the exhaust should be checked for corrosion or blowing joints, as an eleven-year-old exhaust system is approaching the typical end of its service life.