2016 Mercedes-Benz GLS 5.5L Petrol · JC03 AHO

This 2016 Mercedes-Benz GLS presents an unblemished DVSA record across the last three years of testing, with four consecutive passes from February 2023 through August 2025 and a single unrecorded failure entry also dated February 2023 that appears alongside the pass for that same day, suggesting a minor defect was identified, rectified at the test station, and the vehicle subsequently presented and passed without any defects being logged. The absence of any advisories whatsoever across four separate examinations is notable for a large premium SUV now approaching a decade of age, and it points to either genuinely well-maintained mechanical condition or components being replaced just prior to each test rather than deteriorated items being left to monitor. The most recent pass on 11 August 2025 reinforces this stable roadworthiness narrative and suggests that any underlying wear issues are being actively managed rather than permitted to progress to failure thresholds. Against an expected average of roughly 11,000 to 14,000 miles per year for a large family-oriented SUV of this vintage, the recorded figure of 115,173 miles over ten years sits firmly within the normal usage band, indicating consistent rather than sporadic deployment. This annual accumulation rate of approximately 11,517 miles is the kind of mileage that exercises consumables and suspension components steadily without exposing them to the accelerated wear of high-mileage commercial use, and it also avoids the standing-still degradation associated with prolonged periods off the road. Given that no mileage gaps or sharp annual fluctuations are evident from the test record and the vehicle has clearly been in regular use throughout its life, the drivetrain, braking system, and air suspension components are likely to have been subjected to normal operational loading rather than the corrosive effects of long-term inactivity. For a prospective buyer, the priority inspection areas on a test drive should reflect the known vulnerabilities of the GLS platform at this mileage and age, even though none have yet surfaced on the MOT record. The AIRMATIC air suspension system, particularly the air struts, compressor unit, and valve block, is a known wear item on these vehicles beyond 80,000 miles and should be evaluated by listening for the compressor running excessively after startup, feeling for the vehicle sitting unevenly when left overnight, and noting any harshness or float over undulations that would suggest a failing strut rather than a supple air-spring response. The steering system, including the front lower control arms, drop links, and the integral steering rack, should be exercised through full lock both ways with the vehicle stationary, feeling for clonks, knocking, or any delay in self-centring that would indicate worn linkages. Brake components, despite showing no recorded wear, will be approaching the point where discs and pads warrant measurement on a 115,000-mile SUV, and any judder through the pedal under firm application or a pulsing sensation through the steering wheel on braking should prompt immediate disc thickness and runout inspection. Beyond the suspension and braking systems, the test drive should include careful attention to the 4MATIC drivetrain, transmission behaviour, and any evidence of fluid leaks from the engine, transfer case, or differential housings, as leaks at this mileage are common on Mercedes-Benz products and would warrant a ramp inspection. The exhaust system, including the mounting rubbers and centre silencer, should be checked for rattles on start-up and over bumps, and the underbody should be examined for any corrosion beginning to form on subframe mounting points, brake pipes, and suspension turrets, areas where Mercedes vehicles of this era have been known to develop surface corrosion that has not necessarily yet reached the threshold for advisory recording. Finally, confirm that all electronic systems function as intended, including the infotainment display, parking sensors, reverse camera, and adaptive cruise control where fitted, as electrical gremlins are a more common cause of dissatisfaction than mechanical failures on a GLS with this clean an MOT record.