2017 Mercedes-Benz A-Class 1.5L Diesel · KW67 AAN

The Mercedes-Benz A-Class has shown a clear deterioration in roadworthiness over the past year, with the most recent MOT in November 2025 failing on multiple critical components before passing just thirteen days later. The November 2025 failure highlights a pattern of neglected maintenance, particularly in braking and tyre integrity, where multiple advisories and defects were recorded simultaneously. The front brake discs were flagged as worn but not excessively, yet the pads were already at a critical threshold, with the near-side rear inner pads measuring less than 1.5mm—well below safe operating limits. Tyre damage was widespread, including a near-side front tyre cut deep enough to expose the ply, alongside perishing and cracking on the rear tyres. The engine management light malfunction and inoperative headlamp further underscore a lack of attention to basic vehicle checks. While the subsequent test passed, the persistence of advisories—such as the missing jacking pad—suggests these issues were not fully addressed, indicating a trend of deferred repairs rather than improving vehicle care. The mileage accumulation of 7,404 miles per year aligns with typical usage for a vehicle of this age, though the data reveals a concerning spike in wear between tests. From November 2023 to October 2024, the car covered 6,800 miles in just over a year, but the real red flag appears between October 2024 and November 2025, where 6,666 miles were logged in under twelve months—yet the MOT history shows no intervening checks or repairs. The November 2025 failure occurred at 66,415 miles, just 222 miles before the final test, implying the vehicle was driven in an unsafe condition for an extended period. Prior to that, the 2023 test at 53,173 miles showed early signs of brake pad wear, yet no corrective action was taken before the 2025 failure. The absence of defects in the 2022 MOT at 41,728 miles contrasts sharply with the subsequent decline, pointing to a deliberate or overlooked maintenance lapse rather than inherent mechanical failure. For a prospective buyer, the most urgent areas to inspect in person are the braking system and tyre condition. The recurring brake advisories—thin pads, lipped discs, and uneven wear—demand a thorough check of all four calipers, pistons, and disc surfaces for scoring or corrosion. The near-side rear inner pads were critically thin in November 2025, suggesting the vehicle may have been driven with compromised stopping ability. Tyres require immediate attention: the deep cut on the near-side front and perishing on the rears indicate potential blowout risks, while the lack of replacement between tests raises questions about overall vehicle upkeep. Suspension components, though not explicitly flagged, should also be scrutinised, particularly the front jacking pad’s absence, which may mask underlying corrosion or damage to the subframe or control arm mounts. The engine management light failure in 2025 warrants a diagnostic scan to rule out unresolved faults that could affect emissions or drivability. Structural integrity, while not directly noted, should be visually assessed for rust or distortion, especially around wheel arches and sills, given the vehicle’s age and the history of deferred maintenance.