2009 Mercedes GL 3.0L Diesel · EB02 LOU

The most recent official DVSA examination took place on 25 July 2025, at which the vehicle was presented and passed without any advisories or defects being recorded. This is a positive indicator and is further supported by a clean pass on 1 August 2024. However, looking back through the recorded history, the 2022 and 2023 tests both attracted multiple brake pipe corrosion advisories, and a 2019 test recorded a major failure for an excessively deteriorated offside front brake hose, together with a slight play advisory on the offside front anti-roll bar linkage ball joint. The progressive removal of those advisories by 2024 and 2025 suggests that remedial work, likely including brake pipe and possibly anti-roll bar component replacement, has been carried out, and the overall maintenance trend over the last two years can be regarded as stable and improving. The recorded mileage of 104,757 miles across approximately seventeen years of age equates to an average annual accumulation of around 6,162 miles, which is broadly typical for a vehicle of this vintage. There are no prolonged standing periods evident in the MOT gap pattern, and no rapid mileage escalation between tests that would suggest commercial or heavy-duty use. That said, on a large and heavy four-wheel-drive vehicle such as the Mercedes-Benz GL, even average mileage places meaningful demand on the drivetrain, air suspension system, transmission, and braking components, and any neglected servicing history would be more keenly felt than on a lighter passenger car. Confirming a full and stamped service history, particularly evidence of automatic transmission fluid and filter changes, transfer box and differential oil changes, and replacement of the air suspension bellows or struts, would be highly advisable. For the prospective buyer, the recurring theme of brake pipe corrosion warrants close physical inspection underneath the vehicle, particularly along the front to rear runs and at the four wheel arches where the 2022 and 2023 advisories were concentrated. Surface rust on steel brake lines can quickly progress to perforation, leading to fluid loss and brake failure, so any evidence of bubbling paint, flaking, or active weeping at pipe joints should be treated as an immediate rectification item. The 2019 advisory concerning slight play in the offside front anti-roll bar linkage ball joint should also be checked, as anti-roll bar wear typically progresses and manifests as a clonking noise over speed humps or during direction changes. On the test drive, listen for any binding calipers, brake shudder under heavy pedal application, or pulling to one side, and verify that the brake pedal feels firm and responsive. Given the vehicle's age and complexity, particularly the air suspension, common to many Mercedes GL models of this generation, several age-related checks are strongly recommended even though the recent MOT record is clean. Tyres may have been recently replaced but should be examined for sidewall perishing and cracking, which is calendar-related rather than purely a function of tread depth, and wheels should be inspected for any evidence of corrosion around the hub mating surfaces. The 12-volt battery should be load tested, as vehicles of this age frequently suffer from parasitic drain through aging control modules, and the auxiliary battery that supports the air suspension and infotainment systems is particularly prone to deterioration. Coolant, brake fluid, power steering fluid, and engine oil should all be assessed for age-related degradation rather than simply level, and a thorough undertray-removed inspection of the engine sump, valve cover gaskets, and the seven-speed automatic transmission pan is worthwhile, as the 2022 advisory noted an oil leak which, although not classed as excessive, may have developed further. Finally, a diagnostic scan using Mercedes-specific tooling to interrogate the air suspension, SBC brake system, and all control modules for stored fault codes will provide valuable insight into any latent electronic or hydraulic issues not detectable through a road test alone.