2009 Mercedes-Benz ML 3.0L Diesel · ML59 OCU

Recurring corrosion on the braking system and progressive wear in the front suspension assembly define the mechanical profile of this vehicle. The most recent MOT passed on 2025-11-08, yet it carries a series of advisories that indicate ongoing deterioration in several key areas. Specifically, the brake pipes have been flagged for corrosion across multiple testing cycles dating back to 2021, suggesting a persistent issue with the integrity of the hydraulic lines. Furthermore, the latest inspection introduced new concerns regarding nearside front shock absorber oil misting and worn suspension arm pins or bushes on both the nearside and offside front, marking a shift from purely braking system advisories to more complex chassis and damping issues. The recorded mileage of 116,987 miles over approximately 17 years equates to an average annual usage of roughly 6,882 miles. This represents a relatively low-to-moderate usage pattern for a vehicle of this age and type. While this lower annual accumulation typically suggests less frequent mechanical stress on the drivetrain compared to high-mileage vehicles, it can also correlate with the type of corrosion seen in the MOT history. Vehicles driven fewer miles annually may spend more time stationary or in environments where road salt and moisture can settle on components like brake pipes and suspension linkages without being cleared by regular, high-speed driving. Prospective buyers should pay close attention to the chassis and underbody during a physical inspection, specifically focusing on the brake pipes that have been repeatedly noted as corroded or obscured by grease. The presence of grease on these lines can sometimes be used to mask the extent of the corrosion, so a thorough visual check is necessary to determine if the pipes require replacement to prevent a sudden loss of hydraulic pressure. On a test drive, the reported nearside front shock absorber misting should be monitored for any signs of active leaking or a loss of damping quality. Any noticeable bouncing or excessive oscillation when hitting undulations may indicate that the shock absorbers are nearing the end of their functional life. The advisories regarding worn suspension arm pins and bushes on both front sides necessitate a careful evaluation of the steering and ride quality. During the test drive, listen for any knocking, clunking, or creaking sounds when navigating uneven surfaces or turning the steering wheel at low speeds, as these are classic symptoms of worn suspension bushings. Additionally, check for any pulling to one side or instability in the steering response, which could stem from the noted wear in the front suspension linkages. The history of inoperative lighting and mirror issues in previous years suggests that while these specific electrical faults were addressed, a general check of all exterior lighting and electric mirror functionality is warranted.