2003 Mercedes-Benz CL 500 5.0L Petrol · CT53 LTE

The most recent MOT test on the 2003 Mercedes-Benz CL 500 took place on 2023-02-17, resulting in a passing outcome with a single advisory regarding the offside rear shock absorber showing light oil misting. While this is not a failing condition, the recurring advisory from previous MOTs—particularly the 2022-11-08 test—suggests a persistent issue with the rear suspension components. The vehicle’s MOT history exhibits a pattern of minor but persistent defects, notably in the braking system and suspension, which indicates a need for closer attention to these areas rather than a clear improvement or stability in maintenance. The failure in 2022 highlights critical issues such as binding rear service brakes and a non-functional central stop lamp, underscoring that while the car may have passed recent tests, underlying wear and potential long-term degradation remain a concern. The vehicle’s recorded mileage of 145,648 miles over approximately 23 years represents an average annual usage of around 6,333 miles, which is relatively moderate for a car of this age and class. This rate of mileage accumulation is typical for a vehicle that has not been subjected to extreme driving conditions or prolonged periods of high usage, though it does not preclude wear on consumables and wear-and-tear components. The absence of significant mileage spikes or long periods of standing suggests the car has been in active service, though the consistent advisories on suspension and braking may reflect regular exposure to road conditions that accelerate component fatigue. Buyers should be aware that lower mileage can sometimes mask issues like corrosion from prolonged idling or fluid degradation due to infrequent servicing, so a thorough inspection of these systems is essential. Given the recurring advisories on the rear shock absorbers and the binding rear service brakes, the prospective buyer should conduct a detailed inspection of the suspension system. Pay particular attention to the rear shock absorbers for signs of further oil leakage, excessive play, or physical damage, as misting can indicate internal failure or progressive wear. On a test drive, listen for unusual clunking or rattling noises from the rear suspension, especially when driving over bumps or at speed, and check for uneven ride height or excessive body roll. The binding rear service brakes may cause symptoms such as a spongy or uneven pedal feel, uneven brake pad wear, or a grinding noise when braking, particularly on the near-side rear wheel. Inspect the rear brake discs for scoring, warping, or corrosion, and verify that the calipers are not binding or seized. For the central stop lamp failure, which was a major defect in 2022, the buyer should replace the faulty lamp or wiring harness to ensure compliance with legal requirements. Additionally, the corroded brake pipe noted in 2020 should be addressed promptly, as corrosion can lead to leaks or structural compromise. The windscreen wiper failure from 2022 indicates that the wiper blades or mechanism may need replacement, as worn wipers can reduce visibility and pose a safety risk. Beyond the MOT-recorded issues, given the vehicle’s age and mileage, the buyer should check the tyre sidewall for signs of perishing or cracking, which can indicate long-term exposure to UV degradation. Inspect the 12V battery for corrosion on terminals, voltage output, and overall health, as older batteries may struggle under the demands of modern electrical systems. Fluid levels—particularly brake fluid, coolant, and transmission fluid—should be checked for freshness, as fluids degrade over time even when not used, and should be replaced according to manufacturer recommendations, typically every 60,000 to 100,000 miles or every 5 to 10 years. Lastly, verify the service history for the timing belt, water pump, and other critical time-based maintenance items, as delays in servicing can lead to catastrophic failures.