2018 Mercedes-Benz X 2.3L Diesel · RF68 FPP

The most recent MOT test on the 2018 Mercedes-Benz X conducted on 2026-01-19 resulted in a passing outcome, though it was not without notable defects and advisories that warrant careful consideration. The overall maintenance trend over the past five years is inconsistent rather than stable or improving, with a notable failure in December 2021 that included major defects related to the registration plate lamps and significant tyre wear close to legal limits. While subsequent MOTs have passed, the recurring advisories—particularly around seat belt webbing damage, suspension bush wear, and oil leaks—suggest ongoing or developing mechanical concerns that may not have reached critical levels at the time of testing but could escalate with continued use. The presence of minor defects such as a deteriorated near-side front drive shaft boot and worn rear anti-roll bar bushes indicates wear progression that should be monitored, especially given the vehicle’s high mileage. The recorded mileage of 143,284 miles for a vehicle aged eight years represents an annual usage rate of approximately 17,910 miles, which is exceptionally high for its age. Such sustained mileage typically accelerates wear on consumables like brake pads, tyres, suspension components, and drivetrain elements, as well as contributing to fluid degradation and potential structural fatigue. The absence of significant mileage gaps suggests the vehicle has been in active service, which can lead to accelerated deterioration of internal components such as seals, gaskets, and lubricants. The tyre wear advisories from previous MOTs, particularly the inner edge wear on multiple tyres, may indicate alignment or camber issues that could worsen over time, leading to uneven tread loss and increased risk of hydroplaning. Additionally, the low tyre pressure lamp being active in multiple tests underscores the need for regular tyre pressure checks and potential alignment verification to mitigate further wear. For the prospective buyer, the most critical areas to inspect during a test drive and physical examination include the suspension system, brakes, and tyre condition. The recurring advisories on seat belt webbing and suspension bushes suggest that the central rear seat belt should be replaced to prevent failure during an accident, and the rear anti-roll bar bushes should be inspected for further wear or replacement, as excessive movement could lead to handling instability. The near-side front drive shaft boot failure indicates a compromised constant velocity joint seal, which could result in oil leakage and increased wear on the joint bearings if not addressed promptly. Listen for unusual suspension clunks or rattles when driving over bumps, as worn bushes may cause excessive movement and discomfort. During the test drive, check for uneven tyre wear patterns, particularly the inner edge wear noted in previous MOTs, which may signal misalignment or incorrect tyre pressure. Inspect the brake system for signs of binding calipers, which were noted in the 2022 MOT, and listen for unusual brake noise or pulsation, which could indicate warped discs or soft pads. Verify that all fluid levels, including brake fluid, coolant, and oil, are topped up and free from contamination, as the oil leak advisories suggest potential issues with seals or gaskets that may require servicing. Beyond the immediate concerns, the buyer should also conduct a thorough inspection of the vehicle’s structural integrity and age-related wear. Given the high mileage, check for signs of tyre sidewall perishing or cracking, which can compromise tyre safety and warrant replacement if severe. Inspect the battery and associated wiring for corrosion or signs of poor connections, as the vehicle’s age and usage may have contributed to reduced reliability. Verify that all service book stamps are up to date, particularly for fluid changes and filter replacements, as the calendar-based degradation of fluids such as brake fluid and coolant should not have exceeded the recommended service intervals. Finally, ensure that the exhaust system is free from leaks or corrosion, as the emissions system should be functioning correctly to comply with current regulations. A comprehensive inspection of the exhaust for leaks and the inspection of the exhaust manifold for signs of overheating or damage is advisable, as high mileage can accelerate wear in these components.