2008 Mercedes-Benz ML 4.0L Diesel · OU08 LNP

The vehicle most recently passed its MOT on 27 March 2026, though it should be noted that this pass was achieved only nine days after a prior failed test which contained a dangerous defect. The maintenance trend across the recorded MOT history is clearly worsening rather than stable. The earlier passes in 2020 and 2021 were largely clean, with only minor advisories relating to tyre condition, a nail in a tyre, brake pipe corrosion, and a child seat restricting inspection. From late 2022 onwards, however, the vehicle began to accumulate significant mechanical issues. The 2022 test produced a failure for a heavily corroded rear brake pipe at the fuel tank bend alongside a damaged windscreen, and by 2025 the vehicle failed for binding front and rear service brakes, a deteriorated CV boot, and a malfunction indicator lamp fault. The 2026 failure escalated further with a dangerous suspension arm defect at the offside front, a leaking rear shock absorber, and further CV boot deterioration, indicating that the underlying mechanical condition of the vehicle is declining despite the relatively modest annual mileage. With 131,442 miles recorded over approximately 18 years, the vehicle has averaged around 7,300 miles annually, which is broadly typical for its age. The recorded MOT tests show a fairly consistent presence on the road, with tests at roughly one to two year intervals and no extended gaps that would suggest prolonged standing. However, the clustering of brake, suspension, and drivetrain defects over the last three years suggests that wear-related deterioration has accelerated regardless of mileage, which is consistent with an SUV of this vintage reaching the stage where suspension and braking components begin to require more frequent replacement. The presence of a binding brake defect in 2025, followed by suspension and shock absorber issues in 2026, is particularly indicative of an ageing chassis requiring progressive overhaul. A prospective buyer should treat the recurring CV boot deterioration on the nearside front drive shaft as a priority inspection point. The defect was first noted in December 2022, persisted as a minor advisory through 2025, and was upgraded to a major failure in March 2026 with the boot no longer preventing ingress of dirt. On inspection, the boot should be examined for fresh grease contamination around the joint, and on a test drive any clicking, knocking, or vibration under sharp steering inputs would suggest joint wear has already progressed. Given the mileage, replacement of the CV joint or driveshaft is likely imminent and should be budgeted for. The dangerous suspension arm defect at the offside front recorded in March 2026 is also critical. The advisory note from the same test indicates that all suspension arm pins or bushes are worn, suggesting widespread degradation across the front and possibly rear suspension. A test drive should focus on listening for clonks or knocks over speed humps, uneven bumps, and during full-lock manoeuvres, and the vehicle should be placed on a ramp for a physical check of all bushes, drop links, and ball joints before purchase. The 2025 binding brake defects at both front and rear callipers, combined with the recurring brake pipe corrosion advisories from 2021 onwards and the 2022 failure for excessively corroded rear brake pipes, point to a braking system that requires comprehensive attention. On a test drive, the buyer should listen for any scraping or grinding, feel for uneven pedal pressure or pulling to one side under braking, and check for any signs of the vehicle failing to release cleanly, particularly after reversing or hill starts. Given the vehicle's age, the brake fluid should be regarded as overdue for renewal regardless of service history, as brake fluid is hygroscopic and degrades over calendar years rather than mileage. The rear shock absorber fluid leak recorded in March 2026 suggests at least one damper requires immediate replacement, and a visual inspection underneath should look for staining, corrosion on the spring seats, and condition of the exhaust mounting, which can deteriorate on a high-mileage ML. Finally, even though the annual mileage is modest, the age of the vehicle means the buyer should physically check the tyres for sidewall cracking and perishing, verify the 12V battery health as units of this age frequently suffer from internal failure, inspect for any signs of standing corrosion around the wheel arches and brake discs, and confirm that the service book contains evidence of regular timing chain, oil, and filter renewals appropriate to the Mercedes-Benz ML service schedule.