2021 Mercedes-Benz GLB 200 AMG Line Premium D A 1.9L Diesel · BU71 ACJ

A pattern of wear-related advisories across brake and tyre systems, combined with a single failed test for wiper and tyre pressure monitoring faults, defines the recorded mechanical history of this 2021 Mercedes-Benz GLB 200. The most recent MOT on 20 October 2025 was a pass, but it carried five advisories concentrated on the rear braking system and rear tyres, alongside a slightly distorted nearside front road wheel. The earlier test on 30 October 2024 initially failed on a non-clearing wiper and an inoperative tyre pressure monitoring system, both flagged asPRS defects, before being re-presented the same day as a pass once rectified; that re-test still recorded both front tyres as worn close to the legal limit and worn on the edge. Overall, the record does not contain structural corrosion, suspension, lighting, or major brake hydraulic defects, but the recurring theme of component wear on consumable items suggests the vehicle has been in regular active use rather than standing idle, with brake and tyre items progressively appearing at each successive test. Recorded mileage stands at 36,836 miles across approximately five years of age, equating to a typical annual accumulation of around 7,367 miles per year. There are no extended gaps in testing that would indicate prolonged off-road periods, and the mileage progression between the 2024 and 2025 tests is consistent with steady, ordinary usage rather than any abrupt increases or long stationary intervals. For a diesel-powered GLB of this age, this mileage band is broadly expected and means consumable wear items such as brake pads, discs, and tyres will have been subjected to normal working cycles. The diesel powertrain is less prone to the short-trip corrosion issues that affect petrol equivalents, and the lack of multi-year lay-up in the record reduces the likelihood of dormant faults associated with seized brakes, degraded coolant, or deteriorated diesel fuel systems. For a prospective buyer, the rear braking components flagged in the 2025 advisory warrant close physical inspection. With rear brake pads noted as wearing thin and the rear brake discs recorded as worn but not excessively, a test drive should include firm pedal applications from moderate speed to check for any judder through the pedal, which would suggest disc runout or uneven wear, and to listen for any grinding or scraping from the rear caliper area indicating pad material depletion. The nearside front wheel was also recorded as slightly distorted, so particular attention should be paid to steering vibration at motorway speeds and any imbalance felt through the front end, as a bent rim can also produce uneven tyre wear and inconsistent braking response. The nearside front strut area should be inspected for any signs of fluid leakage or corrosion around the spring seat, although no suspension advisories have been raised. The tyre-related advisories deserve close scrutiny, given that both front tyres were flagged as edge-worn in 2024 and both rear tyres now show cracking, perishing, and slight damage. Edge wear on the fronts typically points to either chronic under-inflation or geometry misalignment, so the buyer should verify that all four tyres are of matching size, correct load and speed rating, and show even tread across the full width rather than just in the centre. The cracking noted on the rear tyres is age-related as much as mileage-related, and a visual check of sidewall flex area and tread grooves for visible splits is worthwhile. Finally, because the 2024 test recorded a malfunctioning tyre pressure monitoring system and a non-clearing wiper, the buyer should confirm that the TPMS warning light functions correctly on ignition, that all four sensors are transmitting, and that the wiper blades and linkage sweep the full swept area without smearing, as intermittent electrical or mechanical faults of this nature can recur on Mercedes vehicles of this generation.