2004 Mercedes-Benz C 2.7L Diesel · GL54 ADV

The vehicle's roadworthiness shows a concerning downward trend in mechanical stability, as evidenced by the most recent MOT results. While the January 2025 test at 103,361 miles resulted in a pass, the vehicle failed earlier that same day due to a fractured offside front coil spring and a non-functional direction indicator. The persistent presence of an engine management light, which first appeared as a failure in October 2019 and remains present in the 2025 record, suggests an unresolved electronic or sensor issue that has been carried through multiple years of testing. The mileage profile indicates a low-use vehicle, averaging approximately 4,698 miles per year over its 22-year lifespan. This pattern is consistent with the recorded figures, moving from 94,796 miles in November 2020 to 103,361 miles in January 2025. However, the low annual mileage may contribute to the degradation of rubber components and fluid-related issues. The record shows several years of relatively clean testing between 2018 and 2021, but the frequency and severity of advisories and failures have increased significantly since late 2022. A prospective buyer must prioritise a thorough inspection of the braking and suspension systems. The December 2023 test flagged imbalanced front and rear brakes and deteriorated rear brake hoses, while the December 2022 test noted corroded brake pipes across all four corners. These recurring issues with the braking circuit, combined with the recent coil spring failure, indicate that the chassis and suspension components are reaching the end of their service life. The report of a rusty rear subframe in December 2022 represents a significant structural concern that requires physical verification to ensure the integrity of the vehicle. Further attention should be directed toward the exhaust and steering. The 2023 record noted a minor exhaust gas leak and play in the steering rack inner joints, issues that often stem from long periods of inactivity or age-related wear. Given the recurring engine management light and the history of headlamp aim failures, the electrical and sensor systems should be professionally diagnosed. The presence of under-engine and body covers may be masking further corrosion on the underside, making a dedicated inspection of the chassis and subframe essential before purchase.