2022 Mercedes-Benz Unknown 12.8L Heavy oil · KU72 CZC

The most recent MOT, carried out on 13 November 2025, resulted in a Pass with no recorded defects, and the two preceding tests in December 2024 and November 2023 also returned clean Pass certificates. This uninterrupted sequence of passes suggests that, at the time of each inspection, the vehicle met the statutory safety and emissions standards and that any routine maintenance required to keep it roadworthy has been performed to a satisfactory level. There is no evidence from the MOT records of a deteriorating trend; however, the absence of recorded faults does not preclude wear that may be developing between test intervals, especially given the vehicle’s exceptionally high mileage. At four years old the car has accumulated 387 225 miles, equating to roughly 96 800 miles per annum – a usage rate far above the typical UK average of 10‑12 000 miles per year. Such intensive mileage indicates that the power‑train, suspension, braking system and consumable components have been subjected to continuous loading and thermal cycles. While the MOT data show no recent failures, the sheer volume of kilometres travelled means that wear items such as engine bearings, timing chain or belt, clutch, gearbox synchronisers, shock absorbers, bushings and brake discs are likely to be approaching the end of their design life. Any gaps in the recorded mileage history are not evident, so the high annual accumulation appears consistent rather than a sudden surge, which further reinforces the need for a thorough mechanical appraisal. A prospective buyer should conduct a detailed visual and tactile inspection of the tyre tread depth, sidewall condition and any signs of cracking or perishing, as tyres older than four years can degrade even if tread remains adequate. The suspension should be examined for worn or cracked rubber bushings, leaking shock absorber seals and any looseness in the control arm pivots, which may manifest as clunking noises over bumps. The braking system warrants close scrutiny: check the thickness of the front and rear discs for excessive wear or rusted spots, ensure the pads have sufficient material, and listen for any pulsation or squeal under moderate braking that could indicate warped discs or glazed pads. Engine oil should be examined for colour and level, and the oil filter inspected for signs of contamination; given the mileage, a full engine flush and oil change with a high‑spec synthetic oil is advisable. The transmission fluid (whether automatic or manual) should be checked for correct level, colour and any metallic particles, as high kilometre counts increase the risk of internal wear. Finally, assess the condition of the coolant, power‑steering fluid and brake fluid – all of which can degrade over time regardless of mileage and should be replaced on a calendar basis. In addition to the mechanical checks, verify the existence of a complete service book with stamps for oil changes, filter replacements and major service milestones such as timing chain or belt inspections, which are critical on a high‑mileage Mercedes‑Benz. The 12‑volt battery should be tested for cranking amperage, as prolonged high‑output demand can shorten its life, and the alternator output should be confirmed to be within specification. Look for any signs of rust or corrosion on the chassis, especially around wheel arches, sills and underbody panels, as standing periods can accelerate deterioration even on a vehicle that has been driven heavily. A comprehensive test drive covering a range of speeds, steady cruising, and gentle braking will help reveal any hidden faults such as transmission judder, engine mis‑fire, excessive vibration or abnormal exhaust smoke, all of which become more likely as components approach the limits imposed by the extraordinary mileage recorded.