2011 Mercedes-Benz C 2.1L Diesel · CP11 EOO

Corrosion of the braking system and significant engine oil leakage define the recent mechanical history of this vehicle. While it achieved a pass on 30 March 2026, the record shows a pattern of deteriorating brake pipe integrity and a major failure in March 2025 due to excessive oil leaks and corroded brake pipes on both the nearside and offside. The most recent test also noted that engine covers and under trays prevented a full inspection of some components, leaving a gap in the current mechanical visibility. With 135,260 miles recorded over fifteen years, the vehicle has averaged approximately 9,017 miles per year. This usage pattern is typical for its age, suggesting a consistent level of wear across the drivetrain, suspension bushings, and braking components. There are no significant gaps in the testing history, indicating the vehicle has remained in active use rather than suffering from the degradation associated with long-term standing. Given the history of major brake pipe corrosion and the previous advisory regarding the nearside front anti-roll bar ball joint dust cover, a physical inspection of the underbody is essential. During a test drive, listen for knocks or clunks when traversing uneven surfaces or during low-speed cornering, which may indicate worn suspension linkages or ball joints. Ensure the brake pedal feels firm and consistent, as any sponginess could relate to the previous pipework issues or the current state of the hydraulic system. The previous major failure for excessive oil leakage requires verification that the source of the leak has been permanently rectified rather than temporarily cleaned for testing. Inspect the engine bay and the ground beneath the vehicle for any fresh oil misting or pooling. Because the latest MOT inspector was unable to fully view certain components due to the fitted under trays, a professional technician should remove these covers to confirm there are no recurring leaks or new corrosion points on the subframe and brake lines.