2008 Mercedes-Benz ML 6.2L Petrol · RU57 TDC

Recurring issues with the braking system and persistent oil leaks define the mechanical history of this Mercedes-Benz ML, which most recently achieved a pass on 8 October 2025 without any recorded defects. While the current status is clear, the vehicle has demonstrated a pattern of intermittent component degradation, specifically regarding brake hoses and pipes, alongside a long-standing history of minor oil leaks noted as far back as 2019. The transition from a 2021 failure due to chafed brake hoses to the 2024 advisories regarding corroded brake pipes suggests that the hydraulic system requires ongoing vigilance, as these components have been flagged multiple times over the last several years. With an odometer reading of 78,497 miles over eighteen years, the vehicle averages approximately 4,361 miles annually, indicating a period of light usage. While this low mileage may suggest reduced stress on the drivetrain, it often correlates with the deterioration of rubber components and seals that can perish or harden during periods of inactivity. The repeated mention of oil leaks across several test cycles indicates that seals or gaskets may be weeping, which is common in vehicles of this age and usage profile, necessitating a thorough inspection of the engine bay and underbody for fresh fluid accumulation. Prospective buyers should prioritise a detailed physical inspection of the brake lines and hoses, as the 2024 advisories specifically mentioned corrosion covered in grease or other material. During a test drive, ensure the brake pedal feels firm and consistent; any sponginess or excessive travel could indicate air in the system or failing seals. Listen closely for any grinding or metallic scraping noises when applying the brakes, which would indicate that the rear pads, previously noted as wearing thin in 2023, have reached the end of their service life. Given the history of oil leaks, check for any burning smells or visible smoke from the exhaust during acceleration, which could point to oil leaking onto hot engine components or into the exhaust system. Inspect the underside of the vehicle for signs of oil staining on the subframe or suspension components, as these can obscure the source of a leak. Furthermore, since the vehicle has a history of tyre wear on the edges, pay attention to any steering pull or vibration through the steering wheel at motorway speeds, as these symptoms often indicate that the suspension geometry or alignment requires adjustment to prevent premature tyre degradation.