2003 Mercedes CL 500 5.0L Petrol · SUN 11C

This twenty-three year old Mercedes CL 500 presents a roadworthiness record notable for its consistency and absence of any recorded advisories or defects across five MOT tests spanning four years, culminating in a clean pass on 13 June 2025. The single failure on 19 March 2024 was recorded without any defect entry, which typically indicates either an administrative refusal or an issue resolved and re-presented the following day when the vehicle passed cleanly on 20 March 2024 with no defects recorded. The complete absence of advisories over multiple test cycles is somewhat unusual for a car of this vintage and complexity, and warrants scrutiny, as it could indicate either exemplary maintenance or simply that items such as corrosion, suspension wear, or minor fluid leaks were not flagged by the testing station. Prospective buyers should treat the spotless record as a starting point for physical inspection rather than a definitive endorsement of condition, particularly given the vehicle's age and the propensity of W220-chassis cars for chassis, suspension, and electronic wear. Recorded mileage of 143,443 miles over roughly twenty-three years equates to approximately 6,237 miles annually, a moderate accumulation rate that sits comfortably within typical expectations for the model. The mileage progression across the recorded tests appears broadly consistent with this average, with no dramatic gaps or sudden surges that would suggest long periods of inactivity followed by heavy use or potential odometer irregularities. Mechanically, this level of annual usage means the major drivetrain components, including the M113 5.0 V8 engine and five-speed automatic transmission, have been kept in regular operation rather than left to deteriorate through infrequent use, which is generally favourable for preventing issues such as dried seals, oxidation in the transmission, and seized brake calipers. However, at this mileage the engine's timing chain guides, valve cover breathers, and engine mounts will be approaching or past their typical service intervals, and the automatic transmission should ideally have had at least one fluid and filter change to remain reliable. Given the complete absence of recorded advisories, a physical inspection should focus specifically on the well-documented weak points of the W220 CL 500 chassis that MOT testers may not necessarily flag. On a test drive, listen for any clonking or knocking from the front suspension, particularly over speed humps and uneven surfaces, as the Airmatic air struts, ABC hydraulic suspension components, and the lower control arm bushes are all prone to wear and leakage on high-mileage examples. Feel for vibration through the steering wheel under braking, which would suggest warped front brake discs, and check for any pulling to one side, as the rear self-levelling suspension linkages can corrode and bind. With the engine running, listen for any rattling from the timing cover area on cold start, which could indicate stretched timing chains, and watch for blue smoke from the exhaust on start-up, a common symptom of valve stem seal deterioration. Body and structural integrity is another critical inspection area for a vehicle of this age and luxury class, particularly around the wheel arches, sills, and the rear subframe mounting points where road salt can accumulate. Inspect the underside thoroughly for any signs of bubbling paint, surface corrosion, or previous patch repairs, paying particular attention to the jacking points and suspension turret areas. The ABC hydraulic system, if fitted, should be checked for any warning messages on the dashboard, as pump and accumulator failures are common and costly on this model. Finally, verify that all electrical systems function correctly, including the COMAND infotainment, electric seats, soft-close doors, and climate control, as the complexity of the electrical architecture on these vehicles means that latent faults may not surface during a short test drive but could prove expensive to remedy once identified.