2017 Mercedes-Benz A-Class 1.5L Diesel · HX17 TSZ

The most recent MOT history for this 2017 Mercedes-Benz A-Class reveals a concerning pattern of inconsistency rather than a stable roadworthiness trend. The vehicle failed twice in succession in September 2025—both tests conducted on the same day at 97,438 miles—despite passing cleanly in September 2024 and September 2023. The lack of recorded defects in these failures suggests either a procedural anomaly or a test centre oversight, but the repeated testing at the same mileage implies unresolved issues were not addressed before retesting. The most recent pass in September 2025, just ten months ago, means the vehicle has not been through a full MOT cycle since then, leaving critical components unverified for potential degradation over 9,000 miles of use. Mileage progression for this vehicle shows a steady but typical accumulation, averaging around 10,800 miles annually—a rate consistent with moderate usage. The gap between tests is standard, with each MOT occurring roughly every 12 months, aligning with the vehicle’s age and mileage. There are no abrupt spikes or prolonged periods of inactivity to suggest neglect or excessive wear beyond expected levels. However, the repeated testing at 97,438 miles in 2025 raises questions about whether maintenance was deferred or whether underlying issues—such as recurring brake, suspension, or emissions faults—were overlooked between services. Given the lack of specific defect details in the failed tests, a buyer should prioritise an independent inspection of high-wear components that commonly fail in this model. Focus on the braking system, particularly rear calipers or binding mechanisms, as repeated failures often point to worn pads, glazed discs, or seized components. The suspension should be scrutinised for degraded bushes, coil springs, or excessive play in struts, which can develop over 97,000 miles without visible external corrosion. Structural integrity, including underbody corrosion around the sills, wheel arches, and exhaust system, should also be checked, as Mercedes-Benz A-Class models are prone to rust progression in these areas. Emissions-related faults, if present, may indicate catalytic converter degradation or fuel system inefficiencies, warranting a diagnostic scan. While the MOT record suggests no major structural failures, these areas demand thorough examination to confirm their condition beyond the scope of a basic test.