2018 Mercedes-Benz X350 Power D 4MATIC Auto Heavy oil · UJZ 7

The 2018 Mercedes-Benz X-Class (X350 Power D 4MATIC Auto) has a clean MOT history over the past three years, with all tests conducted between March 2023 and April 2025 passing without any recorded defects or advisories. This consistent performance suggests a stable maintenance regimen, though the absence of failures does not guarantee future reliability without further scrutiny. The vehicle’s absence of any prior MOT failures or advisories—particularly none related to critical systems such as the drivetrain, exhaust, brakes, or structural integrity—indicates that, to date, the owner has avoided the most common failure modes associated with this generation of the X-Class. However, the lack of a recent service history or any recorded advisories does not preclude latent issues from developing over time, especially given the vehicle’s age and accumulated mileage. The recorded mileage of 74,174 miles is consistent with typical usage for a nine-year-old vehicle, averaging approximately 9,272 miles annually. This rate aligns with moderate, regular driving patterns rather than either light or heavy use, which would be reflected in lower or higher mileage figures, respectively. The absence of significant mileage gaps—such as periods where the vehicle stood unused for extended periods—suggests that the owner has likely maintained a steady, if not aggressive, driving schedule. While this usage profile does not inherently indicate wear beyond normal expectations, it does imply that consumables like brake pads, tyres, and fluids may have experienced more frequent replacement cycles than a lower-mileage vehicle. The 4MATIC transmission, in particular, benefits from regular use to prevent internal wear, though the absence of recorded transmission-related advisories in the MOT history is encouraging. Given the vehicle’s age and the clean MOT record, the prospective buyer should conduct a thorough physical inspection to identify any age-related or usage-induced wear that may not have been flagged by the MOT test. Focus on the tyre condition, particularly for signs of sidewall cracking or perishing, which can compromise structural integrity and safety, especially on older vehicles. Inspect the 12V battery for corrosion on terminals and cables, and test its charge capacity by attempting to start the engine repeatedly—older batteries may struggle under prolonged cold or high-mileage conditions. The brake system should be checked for corrosion on discs and linings, particularly if the vehicle has been stationary for prolonged periods, which can cause rust buildup and binding calipers. Additionally, verify the service history for fluid replacements, including the coolant, brake fluid, and transmission fluid, as these fluids degrade over time regardless of mileage. Given the vehicle’s age, the coolant should be replaced every five years or 60,000 miles, whichever comes first, to prevent overheating and corrosion within the cooling system. During a test drive, the buyer should listen for any unusual noises from the suspension, such as clunks or rattles, which may indicate worn suspension bushes or damaged coil springs. Pay attention to the steering feel, ensuring there is no excessive play or binding, as this could signal issues with the steering rack or tie rods. The exhaust system should be inspected for leaks or excessive noise, which could point to a failing catalytic converter or muffler. The vehicle’s handling and braking performance should be evaluated for any signs of uneven tyre wear, which may indicate misalignment or suspension issues, or brake shudder, which could be caused by warped discs or contaminated brake fluid. Finally, the owner should consider scheduling a professional inspection of the drivetrain, particularly the differential and driveshaft, given the vehicle’s mileage and the 4MATIC transmission’s complexity. While the MOT history is clean, a comprehensive mechanical check is prudent to address potential wear before it escalates into costly repairs.