2020 Mercedes-Benz GLC 1.9L Diesel · EU20 XDX

The most recent DVSA MOT test for this 2020 Mercedes-Benz GLC was conducted on 24 October 2025, at which the vehicle achieved a Pass classification, although an advisory was recorded against the offside rear tyre for being worn close to the legal limit with heavy wear on the inner shoulder. Reviewing the broader test history, the vehicle has now passed four consecutive tests, with a prior failure on 22 March 2024 attributed to a dangerous nearside rear tyre with exposed ply or cords, alongside minor windscreen wiper and glazing defects. The absence of any repeat advisories, structural corrosion issues, suspension or brake failures across the recorded tests suggests that, from a regulatory standpoint, the maintenance trend has been broadly stable and improving since the early 2024 tyre failure, indicating that the previous safety-critical tyre issue was addressed promptly rather than representing a recurring neglect pattern. With 64,099 miles recorded over approximately six years of service, the GLC is averaging around 10,683 miles annually, which sits comfortably within the typical usage band for a premium mid-size SUV of this age. This neither suggests a low-mileage, predominantly garaged example prone to standing-related degradation nor a high-mileage workhorse likely to suffer accelerated drivetrain fatigue. The relatively even mileage accumulation supports the assumption of consistent mixed use, meaning that wear on major mechanical assemblies such as the engine, transmission, four-wheel-drive system, and suspension should be proportionate to the odometer reading rather than artificially advanced through prolonged periods of inactivity or conversely excessive long-distance running. For a prospective buyer, the advisory and prior failure relating to the rear tyres warrant close physical inspection. The 2025 advisory specifically flagged inner shoulder wear on the offside rear, which is a classic symptom of either rear wheel misalignment, worn rear suspension components such as trailing arm bushes, coil springs, or anti-roll bar linkages, or a combination of both. On a test drive, particular attention should be paid to any clonks or rattles emanating from the rear axle over uneven surfaces, any lateral instability or vagueness during lane changes, and any pulling or uneven steering response. The nearside rear tyre failure in early 2024 should also prompt verification that the wheels have been correctly refurbished or replaced since, and that a full four-wheel alignment was carried out to rectify whatever caused the uneven wear pattern. With the rear tyres now approaching the legal limit again, budgeting for a replacement set shortly after purchase would be prudent. Beyond the recorded tyre concerns, several age- and mileage-appropriate checks are strongly advisable. Despite passing MOT visual brake assessments, the discs and pads should be physically measured for remaining friction material and rotor thickness, as six-year-old Mercedes braking hardware may be approaching a major service interval depending on driving style. All four tyres should be examined for sidewall perishing or cracking, as rubber degrades with age regardless of tread depth, and the production date coded on the sidewall should ideally be within the last three to four years. The 12-volt battery is a known service item on later GLC models equipped with stop-start technology and should be load-tested, particularly as the vehicle approaches seven years of age. Furthermore, confirmation should be sought that time-based services have been undertaken, including engine oil and filter changes, brake fluid replacement (typically every two years regardless of mileage), coolant renewal, and if applicable, automatic transmission fluid and filter servicing. A complete service history stamped in the Mercedes-Benz service book or a recognised specialist's documentation will provide the strongest reassurance that the vehicle has been maintained to the standards expected of a premium SUV of this calibre.