2020 Mercedes-Benz X 3.0L Diesel · AA20 RON

The Mercedes-Benz X presents a highly stable and clean maintenance trend, passing its most recent MOT on 6 June 2025 at 29,971 miles with zero defects or advisories. This flawless record across three consecutive annual tests indicates consistent mechanical health and a complete absence of recurring faults. The vehicle has remained entirely roadworthy throughout its recent service life, demonstrating no worsening or emerging mechanical issues. The mileage accumulation is notably low for a vehicle of this age, averaging roughly 4,995 miles per year. Between the 30 June 2023 test at 21,359 miles and the 27 June 2024 test at 26,449 miles, the vehicle covered 5,090 miles. The subsequent year saw a slight reduction in use, traveling 3,522 miles to reach the 2025 reading of 29,971 miles. Such low annual mileage suggests the vehicle has spent significant periods standing still, which can present its own set of maintenance challenges distinct from high-mileage wear. Despite the pristine MOT record, a buyer must inspect components that degrade with age and inactivity rather than use. Low-mileage vehicles often suffer from deteriorated rubber suspension bushes and perishable brake hoses that fail from dry rot rather than friction wear. The tester flagged no structural corrosion in the recent tests, yet a physical underbody inspection remains prudent to check for surface rust on brake discs, exhaust components, and subframe mounts resulting from prolonged standing. Tyre age and condition also warrant close scrutiny, as the original rubber may be approaching the end of its safe service life regardless of remaining tread depth.