2012 Mercedes-Benz ML 3.5L Diesel · WG12 ACV

The most recent MOT test on 2026-04-07, just three months ago at 122,404 miles, resulted in a failure—though notably without any recorded defects. This abrupt termination of the test suggests an administrative or procedural issue rather than a mechanical failure, as no faults were logged. The preceding tests show a pattern of consistent passes without advisories, with the last two tests in 2024 occurring just ten days apart—one passing and one failing—both at 115,639 miles. This suggests either a rare administrative error in the DVSA system or a vehicle that has otherwise remained mechanically stable over the past three years, with no recurring faults to indicate worsening conditions. The mileage progression reveals a steady accumulation of approximately 8,700 miles annually, which aligns with typical usage for a vehicle of this age. There are no prolonged gaps in service, though the 2024 tests were unusually close together, implying either a rushed rescheduling or a temporary oversight. The most significant mileage jump occurred between the 2023 and 2024 tests, where the vehicle covered roughly 4,000 miles in under a year—still within reasonable bounds but worth noting for potential accelerated wear on high-stress components like suspension bushes, drivetrain seals, or brake calipers. Given the lack of recorded defects in any test, the primary focus for an in-person inspection should centre on components prone to age-related deterioration in this model. The suspension system, particularly the coil springs and bushes, should be examined for uneven wear or corrosion, as these are common failure points in a 14-year-old Mercedes-Benz. The braking system—especially the rear calipers and discs—requires scrutiny for binding or excessive wear, given the vehicle’s history of passing without advisories; a tester may have overlooked subtle issues in prior tests. Structural integrity should also be assessed for signs of rust or frame damage, particularly around wheel arches and underbody panels, where salt corrosion can compromise safety-critical elements over time. Finally, the exhaust system and emissions controls should be checked for leaks or excessive corrosion, as these are frequently overlooked but critical for both performance and legal compliance.