2008 Mercedes-Benz ML 3.0L Diesel · R7 PTC

The 2008 Mercedes ML currently holds a valid MOT pass dated 10 March 2026 at 129,975 miles, though the maintenance trend over the preceding two years reveals a pattern of recurring defects rather than consistent preventative upkeep. The most recent test flagged an oil leak, classified as not excessive under item 8.4.1 (a) (i), which is the same advisory carried forward from the failed test on 3 March 2026 at 129,616 miles. That earlier failure also exposed a nearside front tyre with ply or cords visible on the outer sidewall and a deteriorated nearside front steering rack gaiter. The fact that the oil leak persisted across both the fail and pass attempts suggests it was monitored rather than properly rectified. A clean pass on 8 March 2024 at 120,494 miles stands in contrast, but the subsequent failure just four days later on 4 March 2024 at 120,491 miles for excessively corroded front brake pipes on both sides indicates a serious structural concern that was addressed only to the minimum standard required to pass. The mileage accumulation of roughly 7,221 miles per year over eighteen years is broadly typical for a vehicle of this age and class. The record shows a jump of approximately 9,125 miles between the March 2024 test at 120,494 miles and the February 2025 test at 124,581 miles, representing a twelve-month interval. A further 5,394 miles were added between February 2025 and March 2026. There are no alarming gaps in the testing record that would suggest the vehicle sat unused for extended periods, and the annual mileage has remained relatively steady rather than spiking or dropping dramatically. A buyer inspecting this ML in person should focus on the areas the MOT record repeatedly highlights. The front brake lines and pipework near the flexi-hoses warrant close examination for fresh corrosion or recent replacement, as the 2024 failure for excessive corrosion on all four front brake pipes is a significant structural concern on a vehicle of this age. The steering rack gaiter on the nearside front should be checked for splits or oil contamination, since a failed gaiter allows dirt ingress that accelerates rack wear. The persistent oil leak, while currently deemed not excessive, needs identification of its source, whether that is a rocker cover gasket, oil cooler seals, or a main seal, as oil leaks on Mercedes M156 and OM642 engines can escalate and contaminate other components. Tyre condition and sidewall integrity should also be verified, given the exposed cord advisory on the nearside front and the worn-edge wear pattern noted on both rear tyres in February 2025, which may point to suspension geometry wear in the rear bushes or tracking misalignment.