2012 Mercedes-Benz E 3.0L Diesel · LE51 MAS

The most recent MOT inspection on 21 October 2025 resulted in a pass, but the vehicle is exhibiting a clear trend of worsening advisories regarding braking components and structural corrosion. While the vehicle has maintained a consistent passing record since 2018, the recent addition of rear subframe corrosion to the existing brake disc advisories suggests that the vehicle's condition is beginning to degrade. The recurring nature of the brake disc advisories across multiple years indicates that the braking system is reaching the end of its serviceable life and requires proactive attention rather than mere monitoring. With a recorded mileage of 44,084 over approximately 14 years, this Mercedes-Benz E-Class has been driven significantly below the UK national average, averaging only about 3,149 miles per year. While low mileage often suggests less mechanical wear on the engine and drivetrain, it frequently indicates long periods of inactivity or very short, infrequent journeys. In this specific case, the low usage profile is highly consistent with the observed mechanical symptoms, such as brake disc pitting and tyre perishing, which are classic indicators of a vehicle that spends much of its time stationary rather than being driven regularly to clear moisture and maintain component health. A prospective buyer must pay close attention to the braking system and the chassis during a test drive. The repeated advisories for pitted and scored front and rear brake discs suggest that the surfaces are no longer smooth, which can lead to reduced stopping efficiency and pedal pulsation. You should listen for any grinding noises during braking or a shuddering sensation through the brake pedal, which would indicate warped or heavily scored discs. Furthermore, the advisory regarding rear subframe corrosion is a significant concern for a vehicle of this age. While currently noted as not seriously weakened, corrosion on a structural component can progress rapidly. You should inspect the underside of the vehicle for heavy scale or bubbling paint and ensure that the subframe remains structurally sound, as failure to address this could eventually lead to an MOT failure or compromised handling. Given the low annual mileage and the history of tyre perishing recorded in 2022, a thorough physical inspection of all rubber components is essential. Even if the tread depth appears sufficient, check the sidewalls of all tyres for hairline cracks or perishing caused by age-related ozone degradation, which can lead to sudden failure. Additionally, because the vehicle has likely been subject to long periods of standing, you should verify the health of the 12V battery and check for any signs of fluid degradation. Ensure that all essential fluids, including brake fluid and engine oil, have been changed based on time intervals rather than just mileage, as moisture ingress in brake fluid is a common issue for low-use vehicles. Finally, check for any signs of binding calipers or uneven tyre wear, which could stem from the previously noted wheel bearing play or the tendency for brakes to seize when not used frequently.