2015 Mercedes-Benz C 2.1L Diesel · SD15 ENO

The most recent MOT test on 2025-10-15 confirms the vehicle remains roadworthy, with no defects recorded at 170,434 miles. However, the history includes an unusual double entry for the 2024 test—one failure and one pass—both at 133,253 miles, suggesting either a retest or an administrative error. Beyond that, the vehicle has passed every subsequent test without fail, indicating a stable maintenance pattern in recent years. The absence of advisories or recurring faults implies no systematic neglect, though the high mileage demands thorough scrutiny of high-wear components. The recorded mileage progression reveals an unusually aggressive usage pattern. From 73,948 miles in October 2022 to 133,253 miles in October 2024—a span of just two years—suggests the vehicle averaged over 30,000 miles annually, far exceeding typical expectations for a luxury model of this age. The jump from 133,253 to 170,434 miles between October 2024 and October 2025 further confirms this trend, totaling 37,181 miles in under a year. Such rapid accumulation raises concerns about accelerated wear on suspension bushes, coil springs, and drivetrain components, particularly given the vehicle’s age and premium construction. Given the lack of MOT defects, no structural issues were flagged during recent tests. However, the high mileage necessitates an immediate inspection of critical areas. Focus on the suspension for worn or leaking bushes, particularly at the rear where binding calipers were not recorded but are common in Mercedes-Benz models at this mileage. Brake discs and pads should be measured for uneven wear, as rapid mileage can exacerbate heat-related degradation. The exhaust system warrants attention for corrosion or leaks, especially if the vehicle has seen heavy exposure to road salt or moisture. Finally, verify the integrity of the subframe and sills for signs of rust or distortion, as these are often overlooked but critical for long-term structural safety. The absence of advisories in recent tests is reassuring, but the vehicle’s age and mileage demand a professional pre-purchase inspection. Prioritise components not directly tested in MOTs, such as the timing belt (if applicable), differential fluid condition, and power steering pump efficiency. Document any discrepancies between the MOT’s pass status and visible wear, particularly around the wheel arches, underbody, and wheel bearings. A thorough check of the electrical system—including all warning lights and sensor functionality—is also advisable, given the complexity of Mercedes-Benz diagnostics.