2017 Mercedes-Benz CLS 2.1L Diesel · JU64 ADE

The most recent MOT test on the 2017 Mercedes-Benz CLS recorded a passing result with several advisories, indicating a stable but not entirely flawless maintenance record. While the vehicle has not failed an MOT since 2020, the presence of repeated advisories—particularly around wheel bearings, suspension components, and tyre wear—suggests a pattern of wear that warrants closer attention. The advisories from 2021, including the dangerous failure of a near-side rear road wheel fracture, highlight critical issues that were either overlooked or not fully addressed during previous inspections. This history suggests that while the vehicle has been roadworthy, it has not been without significant mechanical wear, particularly in the suspension and wheel assembly, which could escalate if left unchecked. The vehicle’s recorded mileage of 66,253 miles at the time of assessment represents a reasonable annual usage rate of approximately 7,361 miles, which is typical for a nine-year-old car with moderate demand. However, the MOT history reveals periods of both low and potentially higher-than-normal mileage accumulation, particularly the COVID-19 extension in 2020 suggests a prolonged standstill, which can exacerbate issues such as corrosion, fluid degradation, and bearing wear. The front wheel bearing advisories and suspension bush wear are particularly concerning when considering the vehicle’s age and the potential for increased stress on these components during periods of inactivity. As a result, the wear progression may not be strictly linear, with some elements potentially accelerating due to prolonged idleness or improper maintenance. For the prospective buyer, the most critical areas to inspect during a physical examination are the front and rear wheel bearings, suspension components, and tyre condition. Listen for unusual noises during a test drive, particularly clunking or grinding sounds from the suspension, which may indicate worn bushes or loose components in the rear subframe. Check for uneven tyre wear patterns, especially on the front tyres, which could suggest misalignment or steering system issues. The near-side rear road wheel fracture from 2021 is a severe warning sign, implying that the wheel assembly may have structural weaknesses or fatigue. Immediate attention should be given to replacing the fractured wheel if it was part of a wheel assembly that has been compromised, as this could lead to further failure. Additionally, verify that the suspension components, including coil springs and shock absorbers, are not degraded or leaking, as these can contribute to handling instability and premature wear. Beyond mechanical checks, the buyer should also assess the vehicle’s standing condition for signs of corrosion, particularly around wheel arches, undercarriage, and brake components, which are common areas for oxidation to develop over time. Given the vehicle’s age and the advisories indicating potential fluid degradation, inspect the engine oil, brake fluid, and coolant for contamination or sediment, as these fluids degrade over time even when not in use. Check the 12V battery for signs of corrosion on terminals and ensure it holds a charge when static, as prolonged inactivity can lead to battery failure. Finally, verify that the service book has been updated, particularly for fluid changes and suspension servicing, as the advisories suggest that some maintenance may have been delayed. A thorough inspection of the exhaust system for leaks or excessive noise is also advisable, as the CLS’s catalytic converter and muffler components can wear out prematurely with high mileage or poor maintenance.