2013 Mercedes-Benz ML 3.0L Diesel · AU55 SAD

A discernible mechanical signature emerges from the MOT record of this 2013 Mercedes-Benz ML, centred on a single airbag system fault flagged as a Major failure in August 2020, alongside a consistent but low-level theme of oil seepage and brake disc wear that has surfaced as advisories at the more recent tests. The supplementary restraint system warning lamp failure on 20 August 2020 is a notable event, as any illuminated airbag or SRS warning indicates the restraint system may not deploy as intended, and although a re-test the same day recorded a Pass, the underlying fault and its rectification history cannot be verified from the test data alone. Beyond that singular failure, the vehicle has passed every subsequent annual test, with the most recent examination on 7 July 2026 recording no defects at all. The pattern of advisories, however, is worth closer attention: oil leaks were noted at the central front in 2022 and at the front lower in 2024, both assessed as not excessive, while brake disc wear advisories on both front and rear discs appeared in 2024, suggesting the discs may now be approaching the point where replacement becomes necessary at the next inspection. The mileage trajectory indicates a vehicle that has been used at a broadly typical rate for its age, accumulating 114,012 recorded miles over approximately thirteen years, which equates to around 8,770 miles annually. This places the ML firmly in the moderate-use category, neither garage-bound nor heavily worked. The recorded mileages between tests are not available in the dataset, but the unbroken sequence of annual tests from 2019 onwards suggests the vehicle has remained in regular use throughout this period, with no multi-year gaps that might indicate extended storage. That said, Mercedes-Benz ML models of this era, particularly the ML350 variants with their diesel or petrol V6/V8 powertrains, are known for higher maintenance costs as they age, and the recorded mileage places this example squarely in the territory where suspension components, drivetrain mounts, and air suspension systems (where fitted) begin to demand attention. For a prospective buyer, the most important verification task is to confirm that the airbag system warning lamp fault from 2020 was properly diagnosed and rectified, and that no SRS warning is currently illuminated on the dashboard at start-up or during a short drive. A scan with a Mercedes-compatible diagnostic tool would be advisable to interrogate the restraint system for stored fault codes, as intermittent SRS faults can resurface without immediately triggering the warning lamp. On the road, listen and feel for any irregularity from the front oil leak area: a faint oil misting on the underside of the engine or transmission bellhousing is common on M-Class vehicles, but a dripping leak onto the driveway, accompanied by a burning smell under hard acceleration, would indicate the seepage has worsened beyond the 2024 advisory threshold. When braking, test pedal feel from a standing start and at low speed; a pulsing pedal or vibration through the steering wheel would suggest the front discs flagged in 2024 have reached their wear limit, while any grinding noise from the rear would warrant immediate disc and pad inspection. The suspension system on a thirteen-year-old ML with this mileage warrants specific attention during any viewing. Listen for clonking or knocking noises from the front over speed bumps and uneven surfaces, particularly from the lower control arms, anti-roll bar bushes, and drop links, all known wear items on this chassis. If the vehicle is equipped with the Airmatic air suspension rather than conventional coil springs, the test drive must include a cold start, as air suspension compressors and bellows commonly fail with age and mileage, and a sagging rear end or extended compressor run time on ignition would be a significant concern. The tyres should be inspected for uneven shoulder wear, which on a heavy SUV of this type can indicate worn suspension geometry bushes or alignment issues. Finally, check the bodywork around the wheel arches, sills, and underbonnet seams for corrosion, as Mercedes-Benz vehicles of this generation are not immune to rust in these areas, even though no structural advisories have yet appeared on the MOT record.