2017 Mercedes-Benz GLA 2.1L Diesel · OY17 WNJ

Tyre structural integrity is the defining mechanical concern across this GLA's recent history. At the most recent test on 27 July 2026 the vehicle passed with no recorded defects, but only three days earlier on 24 July it was failed on two Dangerous defects relating to tears on the nearside front and offside rear outer tyres, both caused by separation or partial failure of structure. The Dangerous categorisation is significant, as it denotes a defect presenting an immediate and serious risk of tyre blowout or loss of vehicle control. Crucially, these tyres were not a new finding. The 2025 test had flagged exactly the same pair of tyres with advisories for slight damage, cracking or perishing. This means the casing deterioration was already present a year prior, progressed to a dangerous state within twelve months, and was allowed to remain on the vehicle through that intervening period. The presence of repeated, escalating advisories on the same component is a clear pattern of progressive deterioration rather than an isolated event. Recorded mileage stands at 80,034 miles across nine years, equating to an annual accumulation of roughly 8,900 miles, which sits broadly in line with average usage for the age. There are no extended gaps between annual tests in the DVSA history, suggesting the vehicle has been in consistent use rather than laid up for any prolonged period. Mileage progression between tests appears steady and uninterrupted, with no recorded anomalies that would indicate clocking concerns or a sudden change in usage pattern. For a GLA of this age and mileage, the accumulated wear on suspension components, drivetrain mountings, and brake friction materials should still be expected, but the absence of any unusual gaps means corrosion exposure has been continuous rather than cyclical. A prospective buyer should treat the documented tyre condition as an immediate rectification cost regardless of the pass certificate. All four tyres warrant thorough inspection for sidewall bulges, cracking, exposed ply cord, or any lifting of the tread pattern, with particular scrutiny of the nearside front and offside rear positions. Under inflation can accelerate structural separation in aged tyres, so verifying that all four fitments match in age, brand, and tread depth is essential, and replacement of all four is advisable given the casing failures recorded. Beyond the tyres, the 2021 advisories noted an offside front tyre worn on edge with low tread wear blocks and a nearside rear nail in tyre alongside nearside rear inner brake pad wear reported as very thin. While brake pads were not flagged again in subsequent tests, pad replacement status should be confirmed and the offside front suspension geometry investigated to determine whether uneven edge wear has recurred, as this can point to worn bushes, track rod ends, or a droop link on the front axle common to this platform. On a road test, listen for clonking or knocking from the front suspension over uneven surfaces, particularly at low speed over speed humps and pothole impacts, which would suggest worn anti-roll bar bushes, top mounts, or coil spring seats. The steering should be checked for any vagueness, pulling to one side under braking, or a knocking sensation when turning at full lock, all of which can indicate worn tie rods or drop links. Brake pedal feel should be firm without excessive travel or judder under heavy application, and any vibration through the steering wheel at speed could suggest warped front discs given the recorded front tyre edge wear. Finally, the headlamp aim previously flagged on the 2022 PRS failure should be verified by switching between main and dipped beam against a flat wall to confirm both beams sit below the horizontal cutoff line, as incorrect loading or suspension sag can alter alignment over time.