2005 Mercedes-Benz ML 2.7L Diesel · ST54 AEW

Significant safety system faults and structural component failures define the recent mechanical profile of this vehicle, following a failed MOT on 5 June 2026. The most recent inspection identified multiple major defects including faults with the supplementary restraint system and electronic stability control warning lamps, a non-functional nearside front seat belt buckle, and fractured coil springs on both the nearside rear and offside rear. This failure marks a sharp decline in roadworthiness compared to the relatively clean passing records seen in 2023 and 2024, suggesting a sudden onset of critical component fatigue. The vehicle has covered 53,227 miles over its 21-year lifespan, which equates to an average annual accumulation of approximately 2,535 miles. This is a low mileage profile for a vehicle of this age, which can often result in components such as rubber bushes and suspension elements ageing through time and environmental exposure rather than through high-frequency mechanical wear. The testing history shows a notable gap between 2020 and 2022, and the low usage pattern may contribute to the specific types of degradation observed, such as the corrosion on the rear subframe and the recent failure of the coil springs. Prospective buyers should pay close attention to the braking and suspension systems during a physical inspection. The 2025 MOT recorded advisories for a corroded rear subframe and a fluctuating offside rear service brake, alongside a pitted or scored offside rear brake disc. On a test drive, listen for any knocking or clunking sounds from the rear suspension, which could indicate further issues with the coil springs or the anti-roll bar bushes that were previously flagged as excessively worn in 2022. Additionally, monitor the brake pedal for any pulsation or judder when applying pressure, which would correlate with the recorded brake disc and service brake irregularities. The recent failure of the electronic stability control and supplementary restraint system lamps necessitates a thorough verification that these electronic faults have been rectified. Any lingering issues with these systems represent a significant safety risk. Furthermore, the presence of previous advisories regarding thinning brake pads and worn tyres suggests that consumables should be checked for remaining life. Given the history of anti-roll bar bush wear and fractured springs, the vehicle's handling and lateral stability should be assessed by feeling for any unexpected pulling or instability during cornering or when driving over uneven road surfaces.