2009 Mercedes-Benz C 2.1L Diesel · GF09 FPP

The most recent MOT test on 2026-04-15 resulted in a failure, with the vehicle retaining two advisories—an oil leak that remains non-excessive and offside rear tyre wear approaching the legal limit—while also recording a critical headlamp aim failure. Despite this failure, the broader MOT history over the past seven years shows a pattern of recurring but generally manageable issues rather than a clear deterioration trend. The advisories on oil leaks and tyre wear are consistent across multiple tests, suggesting either persistent mechanical inefficiency or ongoing wear from heavy usage, though the absence of severe failures or structural defects indicates that maintenance has been addressed to date. The minor issues from previous tests, such as deteriorated ball joint dust covers and inoperative registration plate lamps, are non-critical but highlight areas where wear or age-related degradation has been noted. The vehicle’s recorded mileage of 122,491 miles at 17 years old represents a reasonable annual usage rate of approximately 7,205 miles per year, which aligns with typical expectations for a car of this age and class. The steady accumulation of miles over time suggests consistent, albeit moderate, operational use rather than periods of prolonged idleness or high-mileage accumulation indicative of aggressive driving or frequent short trips. However, the presence of recurring advisories—particularly the oil leak and tyre wear—may imply underlying mechanical wear that could accelerate if not addressed promptly. The absence of significant mileage gaps suggests the vehicle has been in regular service, but the combination of wear-related advisories and the age of the vehicle warrants careful attention to prevent further deterioration in critical systems. For a prospective buyer, the most urgent concerns stem from the persistent oil leak and the approaching legal limit on the offside rear tyre. The oil leak should be investigated immediately to determine its source, as prolonged oil loss can lead to engine damage, reduced fuel efficiency, and increased emissions. During a test drive, listen for abnormal engine noises, check for oil contamination on the exhaust or drive train, and monitor for reduced power or hesitation, which may indicate oil starvation or a failing oil pump. The offside rear tyre, worn to within legal limits, should be replaced promptly to avoid road hazards and maintain traction, especially in wet conditions. Inspect the tyre for signs of internal damage or uneven wear patterns that could suggest underlying suspension or alignment issues. Beyond these immediate concerns, the buyer should conduct a thorough physical inspection of the vehicle’s mechanical and electrical systems. Given the age and mileage, focus on the suspension components, particularly the anti-roll bar linkages, which have shown wear-related advisories in previous MOTs. Check for excessive play in the linkages or unusual clunking noises when driving over bumps, which could indicate failing bushings or ball joints. Inspect the front brakes for signs of corrosion on the discs or binding calipers, as standing the vehicle for extended periods can accelerate corrosion. Verify the condition of the tyres for sidewall cracking or perishing, which is common in older vehicles and can compromise structural integrity. Additionally, test the 12V battery and starter system, as prolonged idleness can lead to battery failure or electrical gremlins. Finally, ensure all fluids—oil, coolant, brake fluid, and transmission fluid—are topped up and free from contamination, as age-related degradation in fluids can exacerbate wear on moving parts. A comprehensive service history check, if available, would also provide valuable context on past maintenance and any deferred repairs.