2011 Mercedes-Benz C 2.1L Diesel · KS11 ACV

The vehicle presents a worsening maintenance trend characterized by escalating corrosion and wear issues. While the March 2025 test at 141,648 miles resulted in a pass, the advisory list indicates significant degradation of critical components. The tester flagged corroded rear coil springs and multiple instances of corroded brake pipes, some of which were covered in grease. This pattern of corrosion is not new; the March 2024 test at 129,622 miles already identified corroded rear brake pipes and both rear coil springs. The mileage accumulation is consistent with a typical usage pattern for a 15-year-old vehicle, averaging approximately 9,443 miles per year. The data shows steady progression without significant periods of inactivity, moving from 108,874 miles in October 2020 to the current 141,648 miles in March 2025. This consistent use suggests the vehicle has been regularly driven, which helps prevent some forms of seizure but contributes to the progressive wear seen in the suspension and braking systems. A prospective buyer must conduct a thorough physical inspection of the underbody and braking system. The recurring advisories regarding brake pipe corrosion and the presence of grease suggest an attempt to mask or slow the progression of rust. You should carefully examine the structural integrity of the brake lines and the condition of the rear coil springs to ensure the corrosion has not compromised their strength. The March 2025 advisories also noted both front tyres were wearing close to the legal limit and showing inner edge wear, which often indicates an alignment issue or worn suspension geometry. Further attention should be paid to the front suspension. The June 2022 test at 115,698 miles highlighted worn front suspension arm bushes, and earlier records from 2021 noted play in the front wheel bearings and ball joints. Given the age and the recent findings of tyre wear and component corrosion, a professional inspection of the steering components and the entire suspension assembly is necessary to ensure the vehicle is mechanically sound beyond its current MOT pass status.