2009 Mercedes-Benz ML 3.5L Petrol · LR09 WKB

The most recent MOT test on 20 October 2025 resulted in a pass, accompanied by three advisories relating to the front brake disc being worn, pitted or scored but not seriously weakened, the rear brake disc being worn but not excessively, and light oil misting on the offside front shock absorber. Earlier in the same inspection, the vehicle had failed on two lighting defects, specifically an offside rear stop lamp and an offside rear position lamp not working, both categorised as dangerous and easily remedied, which suggests a localised electrical issue rather than systemic failure. Looking at the broader pattern, the vehicle has passed every annual test since 2020, with the only previous failure occurring in 2021 on headlamp aim, and the advisory trend has been broadly consistent and stable rather than deteriorating. The recurrence of brake disc advisories across consecutive tests does, however, indicate an ongoing wear progression that will require attention in the near future, even though the vehicle has not been refused a certificate. The recorded mileage of 84,239 miles against a 17-year vehicle age equates to an annual average of approximately 4,955 miles, which is well below the typical mileage for a vehicle of this vintage and significantly lower than the national average. This low annual usage figure is consistent with the pattern of MOT test entries, which show broadly incremental mileages between annual inspections, although there is a notable gap in recorded testing between 2020 and 2021, and the figure has remained at 84,239 at the most recent assessment. Such low usage carries its own mechanical considerations, as prolonged periods of standing can lead to degraded brake discs through surface corrosion, sticking or binding brake calipers, and accelerated ageing of rubber components that are not exercised regularly. The relatively static mileage combined with advancing calendar age suggests the vehicle may have spent considerable time inactive between uses, which warrants targeted inspection of components most affected by standing rather than high wear. Given the advisory regarding light oil misting on the offside front shock absorber, a prospective buyer should carry out a careful road test paying particular attention to any knocking, clonking, or excessive bouncing over uneven surfaces, as shock absorber seals commonly deteriorate progressively once initial misting is observed, often progressing to a more substantial leak within twelve to twenty-four months. The repeated brake disc advisories also warrant a physical inspection, as the front disc condition described as pitted or scored typically indicates corrosion of the working surface, which can produce brake shudder, vibration through the steering wheel under heavy braking, and uneven pad wear. During a test drive, listen for any grinding or pulsation through the brake pedal, and verify that the vehicle stops in a straight line without pulling to either side, which could indicate a binding caliper exacerbated by the low-mileage use pattern. Beyond the recorded advisories, the age and low annual mileage of this Mercedes-Benz ML demand a thorough inspection of components that deteriorate with time rather than use. Tyre sidewalls should be examined carefully for cracking, perishing, or UV damage, as tyres older than five years often require replacement regardless of remaining tread depth, and the age marking on the sidewall should be checked against current safety guidance. The 12 volt battery should be load tested, as a battery that has been chronically undercharged due to short journeys and infrequent use will have reduced capacity, and the charging system should be verified. Brake caliper slide pins and mounting brackets should be checked for freedom of movement and signs of seizing, given the known issue of binding calipers on low-use vehicles, and a thorough inspection underneath for corrosion, particularly around suspension mounting points, subframes, and brake lines, would be prudent given the vehicle's age and the road salt exposure typical of UK winters. Finally, verify the service history stamps and ensure that brake fluid, coolant, and automatic transmission fluid have been changed at the manufacturer recommended intervals, as these fluids degrade with calendar age and can lead to internal component failure if left unserviced.