2005 Mercedes-Benz CLS 3.0L Diesel · HA54 MHM

The most recent MOT test on the 2005 Mercedes CLS was conducted in May 2023 and resulted in a clean pass, though it included several persistent advisories that reflect ongoing wear and potential long-term concerns. Over the past decade, the vehicle’s MOT history demonstrates a pattern of recurring issues rather than a clear improvement or deterioration. The advisories on brake disc wear, tyre edge wear, and front track rod end ball joint play have been consistently noted since 2019, suggesting that while the car remains roadworthy, these components are nearing or have exceeded their expected service life. The failure in 2016—particularly for low tyre tread and registration plate defects—indicates that the vehicle had not been maintained to the same standard during that period, but subsequent tests show it has since been brought up to MOT standards. This suggests a mix of either inconsistent upkeep or a shift in ownership, but the overall trend leans towards the advisories being a recurring challenge rather than a sudden worsening of conditions. The recorded mileage of 85,713 miles for a vehicle aged approximately 21 years is unusually low, averaging just 4,082 miles annually—a rate that is far below what would be expected for a car of this age and model, particularly one that has seen multiple MOT advisories. Such low mileage often correlates with periods of prolonged idling or infrequent use, which can exacerbate issues like standing corrosion, fluid degradation, and component wear. For instance, brake discs and tyres that are worn on edges rather than uniformly suggest uneven braking or suspension misalignment, which may have been exacerbated by the car being stationary for extended periods. Additionally, the low annual mileage could mean that consumables like brake fluid, coolant, and transmission fluid have not been cycled regularly, leading to potential degradation over time. The absence of higher mileage figures in the past decade further supports the likelihood of the vehicle having been underutilised, which may have contributed to the observed wear patterns. Given the MOT advisories, the prospective buyer should prioritise a thorough inspection of the brake system, suspension, and tyres to confirm the severity of the reported wear. On a test drive, listen for unusual noises such as grinding from the brakes, which could indicate deeper disc or pad wear beyond the current advisories, or clunks from the suspension, particularly when transitioning between rough and smooth surfaces, which may signal failing track rod ends or coil spring issues. Inspect the brake discs for signs of severe pitting or scoring that could compromise stopping performance, and check for uneven wear patterns that might point to misalignment or binding calipers. The tyres should be examined for sidewall perishing, which is more likely with low mileage and prolonged storage, and ensure there is no excessive cupping or feathering, which could indicate suspension or wheel alignment problems. Additionally, verify that the registration plate remains securely attached and that the lamp system is fully operational, as these were recurring issues in past MOTs. For a vehicle of this age and mileage profile, the buyer should also conduct a visual and functional check of the following critical areas: the battery, which may have degraded from prolonged disuse, and ensure it holds a charge without excessive corrosion on terminals; the coolant system for signs of overheating or leaks, as low annual mileage can lead to stagnant fluid that may not be flushed; and the exhaust system for corrosion or structural integrity, particularly if the car has been stationary for long periods, as moisture can accelerate rusting. The service history should be reviewed to confirm that fluid changes, particularly brake fluid and coolant, have been performed at the manufacturer’s recommended intervals, even if mileage is low. Finally, the buyer should consider a professional inspection of the drivetrain and differential, as low usage can sometimes mask early signs of wear in these components, and any signs of excessive vibration or whining noises during acceleration or braking should be investigated further.