2018 Mercedes-Benz GLC 2.1L Diesel · AY18 VST

Tyre wear has been the most recurrent mechanical issue, highlighted by a dangerous failure on both front tyres in the 2025 test and repeated advisories for rear‑edge wear in 2025 and 2022; the only other notable defect was a severely deteriorated constant‑velocity joint boot recorded in 2024. The latest MOT on 11 September 2026 passed without any recorded defects, indicating that the immediate safety items were addressed, but the history shows a pattern of tyre surface degradation that warrants close scrutiny. At 68 057 mi the vehicle averages roughly 8 500 mi per year, a mileage rate that sits comfortably within normal usage for a 2018 model. There are no significant gaps in the MOT chronology, suggesting the odometer readings are consistent with the testing intervals. This moderate annual accumulation means consumables such as brakes, suspension bushings and engine oil are likely approaching mid‑life service points, and the tyre wear trend should be interpreted in the context of typical wear for this mileage band. When inspecting the tyres, verify that all four have a tread depth of at least 1.6 mm and look for sidewall cracking, edge wear or uneven tread that could indicate mis‑alignment or worn suspension components. During a road test listen for a humming or thumping noise that intensifies when cornering, which may point to tyre‑related issues, and feel for any vibration through the steering wheel that could stem from uneven tyre wear. The CV joint boot noted in 2024 should be examined for grease leakage or cracks; a clicking or clunking sound when turning the steering wheel, especially at low speeds, would suggest joint wear that may soon require replacement. Given the age and mileage, a thorough mechanical check is advisable: inspect suspension bushes, coil springs and any steering linkages for play or corrosion, confirm that brake discs and pads show even wear and are within thickness limits, and ensure there is no evidence of fluid leaks around the drivetrain. Replacing the front tyres and addressing the CV joint boot before further use would mitigate the most immediate risks, and a professional pre‑purchase inspection can verify that no hidden damage has resulted from the earlier tyre failures.