2017 Mercedes-Benz GLC 2.1L Diesel · DS 7035

The most recent MOT, dated 26 January 2026, was passed but recorded an advisory noting slight play in the off‑side front lower suspension arm ball‑joint and the rear arm hub end ball‑joint. Earlier in the series, a failure on 30 January 2024 highlighted an excessively worn near‑side front lower suspension arm ball‑joint, exposed cords on the near‑side front tyre and cracking on the near‑side rear tyre. Those serious defects appear to have been addressed, as the subsequent 1 February 2024 test recorded no failures, and the 2025 and 2026 tests have been clean apart from minor advisory play. The trend therefore shows a period of significant wear in early 2024 followed by corrective maintenance and a generally stabilising condition, though the recurrence of ball‑joint play suggests the suspension components may be approaching the end of their service life. At nine years old the vehicle has logged 53,771 miles, averaging roughly 5,975 miles per annum – well below the typical UK average for a similar‑aged SUV. Such low utilisation often indicates periods of limited use or extended storage, which can be as detrimental as high mileage because components age regardless of distance. The modest annual run‑off reduces cumulative wear on the engine, transmission and brake discs, yet it also raises the likelihood of tyre perishing, battery sulphation and corrosion of suspension bushings from prolonged standing. No evidence of rapid mileage spikes is present, so the wear pattern should be consistent with age rather than high‑stress usage. A prospective buyer should give the front lower suspension arms particular attention. On a static inspection feel for any looseness in the ball‑joint by rocking the wheel at the 12 and 6 o’clock positions; any audible clunk or excessive movement under load could indicate the slight play noted in the latest advisory is progressing. During a test drive listen for knocking or shudder when turning or over bumps, and watch for any wandering of the steering wheel which may betray a worn ball‑joint or deteriorating bushings. Inspect the tyre sidewalls for dry rot, cracking or hardening, especially on the near‑side front and rear where previous damage was recorded. Verify that the tread depth is even and that there are no bulges or exposed cords, as the 2024 failure showed a dangerous exposure that could re‑appear if the tyres have not been replaced. Given the vehicle’s age and low mileage, also examine the condition of time‑sensitive items. Check the 12 V battery for corrosion on terminals and test its cranking voltage; a battery that has sat idle for years often loses capacity even with few miles on the clock. Look for signs of corrosion or rust on the chassis, wheel arches and suspension mounting points, which can develop when the car is stored for long periods. Confirm that the service book shows regular oil, filter and coolant changes, and that the brake fluid has been flushed within the last two years, as fluid can absorb moisture over time. Finally, ensure that all tyre pressures are correct and that the spare tyre, if fitted, is in serviceable condition. Addressing these points will give a clear picture of whether the GLC remains mechanically sound or requires imminent remedial work.