2018 Mercedes-Benz C 2.1L Diesel · G9 BUH

The Mercedes-Benz C-Class in question presents a remarkably clean MOT history over its recent testing cycle, with the most recent inspection on 15 September 2025 at 86,074 miles showing no defects—an outcome that suggests stable mechanical condition and responsible upkeep. The absence of advisories or failures in the past two years indicates no recurring issues with critical systems such as brakes, suspension, or structural integrity. The lone failure in December 2023 at 75,853 miles is an anomaly, as it carried no recorded defects, which implies either a minor administrative oversight or a test conducted shortly after servicing. Overall, the trend is strongly positive, with no signs of worsening mechanical degradation or neglect. The mileage accumulation aligns closely with typical usage for its age, averaging roughly 10,759 miles per year over the past eight years. The most recent 3,352-mile gap between the January 2025 (82,722 miles) and September 2025 (86,074 miles) tests suggests either seasonal lull in usage or a brief period of inactivity, though this is not unusual for a well-maintained vehicle. The 6,409-mile jump between January 2024 (75,931 miles) and January 2025 (82,722 miles) indicates consistent but not excessive driving, reinforcing the likelihood of regular, moderate use rather than heavy commuting or fleet operation. The data is sparse in terms of faults but consistent in terms of mileage progression, offering no red flags for abnormal wear patterns. Given the absence of defects or advisories in recent tests, a buyer should still conduct a targeted inspection of high-wear components that are not always caught in MOTs. Pay particular attention to rear suspension bushes and coil springs , as these are common failure points in Mercedes-Benz models and may not always trigger an advisory until significant degradation occurs. Check for binding calipers or uneven brake pad wear , especially if the vehicle has been driven aggressively, even if past MOTs were clean. Structural corrosion is less likely given the short test intervals, but inspect wheel arches, sills, and underbody panels for early signs of rust, particularly if the car was previously garaged in damp conditions. Finally, verify the exhaust emissions system for leaks or blockages, as even minor issues can escalate without regular diagnostics. The lack of recorded faults does not eliminate the need for a pre-purchase mechanical check, particularly on components prone to silent degradation.