2012 Mercedes-Benz C 2.1L Diesel · MB12 SMB

The most recent MOT inspection on 30 May 2026 resulted in a pass, but the vehicle's maintenance trend shows a concerning pattern of recurring structural and trim-related deterioration. While the vehicle has successfully passed its recent tests, the history reveals a persistent cycle of minor failures and advisories regarding door hinges, catches, and bonnet retaining mechanisms that have remained unresolved for several years. This suggests a reactive rather than proactive approach to maintenance, where issues are noted but not rectified until they reach a threshold of failure. Furthermore, the presence of a radiator fan staying on in 2025 indicates a previous cooling system or electrical sensor issue that, while passed, warrants close monitoring to prevent overheating or battery drain. With 246,288 miles recorded over approximately 14 years, this Mercedes-Benz has covered an average of roughly 17,592 miles per year. This high-mileage profile is significantly above the UK average and indicates heavy, consistent usage. Mechanically, such high mileage places substantial stress on the drivetrain, suspension, and engine components. You should expect accelerated wear on consumables such as clutch assemblies, turbochargers, and various rubber bushings. The high mileage combined with the recorded history of oil leaks and binding brakes suggests that the vehicle has been subjected to rigorous operating conditions, which often leads to more frequent component fatigue compared to lower-mileage examples. During your test drive, pay close attention to the door operation and structural integrity of the latches, as the MOT history shows long-term degradation of hinges and catches. Any hesitation, heavy resistance, or unusual noises when opening or closing doors could indicate that these issues are progressing toward total failure. You must also investigate the reported oil leak from the 2023 inspection. Look for fresh oil weeping around the engine sump, timing cover, or gearbox housing, and check for excessive blue smoke from the exhaust, which could indicate internal engine wear consistent with high mileage. Additionally, listen for any unevenness in braking or a pulling sensation to the nearside, as the history of a binding brake caliper suggests potential issues with piston seizure or sticking components. Given the high mileage and the age of the vehicle, a thorough inspection of the suspension and chassis is essential. Look for signs of excessive play in the ball joints and control arms, as previous advisories have noted movement in the offside front suspension. Check the condition of the rear brake pipes for significant corrosion, as this was previously flagged, and ensure that the brake discs do not show excessive lip or heavy pitting. Because the vehicle has been used heavily, verify that the service history is comprehensive, specifically looking for regular oil changes and coolant flushes. Finally, inspect the tyre sidewalls for cracking or perishing and check the underside for any signs of structural corrosion that may have been masked by grease or road grime.