2003 Mercedes-Benz ML 3.7L Petrol · LS03 OAB

The vehicle's most recent MOT test, conducted on 7 November 2025, resulted in a pass, although it was preceded by a fail just two days earlier on 5 November 2025. The failure centred on an incorrect colour offside rear direction indicator, which appears to have been rectified for the subsequent pass. A pattern is visible across the recent history, with a fail at the 2021 test due to a non-functional front position lamp and an insecure registration plate lamp, and another fail in 2024 owing to track rod end dust cover deterioration and another front position lamp failure. While the vehicle has consistently passed its tests, the recurring advisories relating to rear brake pad wear, brake disc pitting, oil leaks, and corroded brake pipes suggest a maintenance trend that is broadly stable but with ongoing wear items. The accumulation of corrosion-related advisories over consecutive tests indicates a progressive deterioration of underbody components, which is typical for a vehicle of this age. With 123,989 miles recorded over approximately 23 years, the vehicle has averaged around 5,391 miles annually, which is notably low for its age and class. This low annual mileage suggests the vehicle may have seen extended periods of standing or only short, infrequent journeys, which carries its own mechanical implications. Components such as brake discs and calipers are prone to surface corrosion and binding when left unused, and low-mileage operation can lead to oil glazing in cylinder bores or flat spots on tyres. Conversely, the lower overall mileage may mean that major drivetrain components, including the engine, automatic transmission, and transfer case, have experienced less cumulative wear than higher-mileage examples of this model. Prospective buyers should pay particular attention to the recurring advisories concerning the rear brake discs and pads. The brake disc wear noted in 2025, combined with the wearing-thin rear pads, suggests imminent replacement is likely required; during a test drive, listen for any brake shudder under heavy application and inspect for uneven pad deposition on the discs. The recurring oil leak advisories and the 2022 coolant expansion bottle leak should prompt a thorough under bonnet inspection, checking for residue around the sump, valve cover gaskets, and coolant hoses, as well as verifying the coolant level and condition. Given the offside front track rod end dust cover failures recorded in 2024, a test drive should include turning the steering to full lock while stationary and driving over uneven surfaces to listen for any clonking or knocking from the front suspension, which would indicate worn track rod ends or drop links. Given the low annual mileage and the vehicle's age, additional inspections are warranted beyond those items flagged in the MOT history. Check the tyre sidewalls carefully for perishing or cracking caused by age-related rubber degradation, as tyres older than six years may require replacement regardless of tread depth. The 12V battery and auxiliary battery, if fitted, are likely to be original and should be load tested, as prolonged standing will have shortened their service life. Inspect the brake calipers for seized sliders, which commonly cause uneven pad wear on vehicles that see infrequent use. Verify the service book stamps to confirm that time-based servicing such as brake fluid, coolant, and automatic transmission fluid changes have been carried out at the recommended calendar intervals rather than purely by mileage, as these fluids degrade with age irrespective of use. Finally, examine the rear suspension component mounting areas noted as corroded in 2023, and inspect the underbody comprehensively for structural corrosion, paying close attention to the rear chassis legs and mounting points, as structural integrity on a 23-year-old Mercedes-Benz ML warrants close scrutiny.