2012 Mercedes-Benz ML 250 2.1L Diesel · J23 AAA

The 2012 Mercedes-Benz ML 250 presents a stable and improving maintenance trend heading into its most recent MOT. In the May 2026 test at 140,916 miles, the vehicle passed with only a minor advisory for front brake pads wearing thin. This is a marked improvement over the 2023 cycle, where the car failed on 19 May 2023 at 119,219 miles due to an inoperative engine MIL and a severely deteriorated offside front CV joint boot, before passing a retest four days later. The resolution of those defects and two subsequent clean passes in 2024 and 2025 suggest the previous owner addressed the flagged faults promptly and maintained the vehicle without further serious defects. The mileage accumulation is consistent and typical for a 14-year-old vehicle. Between the April 2024 test at 127,256 miles and the May 2026 test at 140,916 miles, the vehicle covered roughly 13,660 miles over 25 months, averaging approximately 6,560 miles per year. This is lower than the lifetime average of around 10,065 miles per year, indicating the vehicle may have seen lighter use or spent extended periods stationary in recent years. The 2023 to 2024 interval shows a more active period, with 7,991 miles added in just under 12 months. No significant gaps or anomalies appear in the record. Prospective buyers should pay close attention to the front braking system. The May 2026 advisory for thin front brake pads indicates these components are approaching replacement, and the condition of the front brake discs should be inspected for scoring or lipping. The 2023 advisory for an oil leak in the engine area, though noted as not excessive at the time, warrants a thorough underside inspection to verify whether the leak has worsened or been repaired. The offside front CV joint boot was flagged as severely deteriorated in 2023, so a buyer should check for any fresh grease splatter or clicking during full-lock turns, which would indicate joint wear following the boot replacement. Given the vehicle's age and its use as an off-road capable SUV, a thorough inspection of the subframe, suspension bushes, and coil springs for corrosion or deterioration is advisable, particularly around the rear suspension mounting points common on this platform.