2004 Mercedes-Benz C 2.1L Diesel · KY54 ABO

The most recent DVSA examination on 19 December 2025 recorded a PASS, issued the day after a prior test on 18 December 2025 was marked as a FAIL with no defects recorded in either case. This pattern, with a fail immediately followed by a pass on the next working day, strongly suggests an administrative reclassification or a minor item addressed at the test station rather than a substantive mechanical rectification, particularly as no advisory or defect codes were captured against either entry. The preceding tests in August 2024 and August 2023 were also clean passes, again with no defects or advisories recorded, which points to a generally stable maintenance trend over the visible MOT history. Taken as a whole, the absence of recurring advisory notes across four test events suggests that wear items such as braking components, suspension linkages, and exhaust system have not been flagged as approaching service limits at the time of those examinations. With a recorded mileage of 89,489 miles against a 2004 build year, this Mercedes C-Class averages around 4,068 miles per annum, which is substantially below the typical 7,000 to 10,000 miles expected for a vehicle of this vintage. Such a figure is indicative of either light genuine use or extended periods of standing, the latter being particularly common with second or third-owner prestige vehicles that are used sparingly. Low annual mileage can mask issues arising from inactivity rather than wear, while also meaning that the odometer reading is unlikely to reflect heavy mechanical fatigue on the drivetrain, clutch, or major engine internals. However, the relatively narrow MOT history window, with entries only back to 2023, leaves a substantial gap unaccounted for, and any service history outside of MOT records should be verified independently. Given the age and low usage profile of this vehicle, several age-related deterioration factors warrant close physical inspection prior to purchase. Tyres should be examined for sidewall perishing and cracking caused by UV exposure and age rather than tread wear alone, as twenty-two-year-old tyres can suffer structural degradation even with unused tread depth. Brake discs, particularly the rear units, are prone to surface corrosion and pitting from standing, and seized or binding calipers are common on vehicles used infrequently; these can manifest as a dragging sensation, uneven braking effort, or pulling to one side under light pedal application. The 12V battery is highly likely to be in a weakened state given the standing periods implied by the mileage, and a load test or date-code verification is prudent, along with inspection of the alternator charging rate. Fluid systems on this C-Class require calendar-based attention regardless of mileage, including coolant, brake fluid, and the automatic transmission fluid where fitted, as hygroscopic absorption and additive degradation proceed independently of use. Rubber components throughout the suspension, including control arm bushings, anti-roll bar links, and engine and gearbox mounts, harden and deteriorate through oxidation rather than purely through flex cycles, so a thorough inspection of these items is advised with attention to any knocking or clonking over uneven surfaces during a test drive. The exhaust system, particularly at mounting points, flex joints, and the rear silencer, should be checked for corrosion given the vehicle's age, and the underbody should be examined for structural corrosion around wheel arches, jacking points, and the rear subframe, which are known vulnerability areas on W203 chassis Mercedes C-Class models. A pre-purchase inspection by a Mercedes specialist or a thorough main-dealer-level appraisal would be strongly recommended to identify latent issues not captured within the MOT history.