2009 Mercedes-Benz E 3.0L Diesel · SC09 AWA

The most recent DVSA examination on 27 March 2023 resulted in a PASS, but this outcome must be considered against the broader test history which suggests a vehicle that is being maintained to a passable standard rather than a comprehensively cared-for one. Across the seven recorded MOT entries spanning 2017 to 2023, the central front oil leak advisory has appeared with notable consistency, having been flagged on virtually every annual test, with a related offside front oil leak advisory noted in 2021. While none of these leaks were classified as excessive at the time of test, a persistent oil weep from the front of the engine is mechanically significant as it typically points to front crankshaft seal, timing cover, or oil cooler gasket degradation on the M-series diesel engines commonly fitted to this model. Given the age of the vehicle, this defect is unlikely to have resolved itself and will almost certainly have progressed. Additionally, the previous failure on 24 March 2023 recorded a dangerous offside front tyre with exposed ply or cords, alongside a major defect concerning an excessively worn offside front anti-roll bar ball joint, indicating that critical suspension and tyre wear items were being deferred until test time. The recorded mileage of 102,569 miles against a 17-year vehicle age equates to an average annual mileage of approximately 6,033 miles, which sits broadly within the typical range for a car of this vintage. However, the MOT record itself contains a conspicuous gap, with no test entries recorded between December 2017 and March 2019, and the spacing of subsequent tests suggests the vehicle may have had periods of limited use. While the odometer reading is not unusual for the age and class of vehicle, buyers should be mindful that Mercedes-Benz E-Class models of this generation are engineered for high mileage duty, and even at moderate annual use, the drivetrain, suspension bushes, and engine mounts will have accrued substantial wear over seventeen years. A prospective buyer should treat the recurring central front oil leak as the priority inspection item. On examination, the underside of the front engine section and the lower timing cover area should be inspected for fresh oil residue, crusting, or active dripping, and the oil level should be checked cold to identify whether the leak has accelerated between services. During a test drive, listen for any timing chain rattle on cold start which would suggest the leak has been contaminating the chain, and monitor for any oil smoke from the engine bay or exhaust on initial startup. Given the previous dangerous tyre failure and anti-roll bar ball joint defect, the front suspension warrants particular attention. Listen for clonks or knocks over speed humps and uneven road surfaces, which would indicate perished anti-roll bar bushes or worn drop links, and visually inspect the tyres not only for tread depth but also for uneven shoulder wear, cracking, or perishing of the sidewalls, as the previous advisory on the nearside rear tyre suggests this vehicle has been prone to rubber degradation. Beyond the recorded defects, the age and relatively modest mileage profile of this vehicle introduce several time-related degradation concerns that a physical inspection should address. Brake discs and calipers on a vehicle that may have stood for extended periods are particularly susceptible to corrosion and seizure, so the wheels should be rotated by hand with the vehicle jacked to confirm free movement and to inspect for pitted or lipped disc surfaces. The 12V battery should be tested for state of health, as batteries beyond five years of age frequently fail without warning, and the service history should be verified to confirm that brake fluid, coolant, and automatic transmission fluid have been renewed on a calendar basis rather than purely by mileage, given the low annual usage. Coolant hoses, vacuum lines, and the condition of rubber intake and intercooler pipes should be examined for hardening and cracking, while the exhaust system should be checked for corrosion at the mounting brackets and joints, as these are known failure points on the E-Class of this era. Finally, ensure that any advisories carried over from the most recent test have been actively rectified rather than merely allowed to roll forward into the next examination.