2014 Mercedes-Benz C 2.1L Diesel · DP14 VRR

Recurring braking system issues and a persistent oil leak represent the primary mechanical concerns for this vehicle, as evidenced by the failure on 1 May 2026. While the car has maintained a consistent pass record since 2019, the most recent test revealed significant faults involving the offside rear braking components, specifically an excessively binding service brake caused by an internal parking brake fault and a 59% brake imbalance across the axle. Although these major defects were rectified to achieve a pass on that same date, the presence of an ongoing advisory for an oil leak, which has been noted in both the 2025 and 2026 tests, indicates a long-term seepage that has not yet been resolved. The vehicle has covered 105,525 miles over its twelve-year lifespan, averaging approximately 8,794 miles per year. This usage pattern is consistent with typical UK annual mileage for a vehicle of this age and suggests a steady rate of wear on consumable components rather than extreme high-mileage strain or the potential degradation associated with long periods of inactivity. This level of accumulation means that while the drivetrain and suspension components should be within expected wear limits, the recent failures in the braking system and the recurring oil leak are the most pertinent indicators of current mechanical status. A prospective buyer should pay close attention to the braking performance during a test drive to ensure the recent major failures have been fully addressed. Listen for any grinding or scraping noises from the offside rear wheel area and feel for any unevenness in braking force or a pulling sensation to one side when applying the brakes at moderate speeds. It is also essential to monitor the parking brake operation; the brake should engage firmly and hold the vehicle securely on an incline without any immediate slipping or feeling of the mechanism failing to fully release. Regarding the recurring oil leak advisory, a physical inspection of the engine bay and the underside of the vehicle is necessary to identify the source of the seepage. Look for evidence of oil misting or wetness around gaskets, seals, or the sump area. On the test drive, observe the exhaust for any unusual smoke or smells that might indicate oil is escaping onto hot engine components. While the current advisory states the leak is not excessive, the persistence of this issue across multiple years warrants a professional assessment to determine if the leak is static or increasing in volume.