2020 Mercedes-Benz GLC 300 AMG Line Prem + D 4M A 1.9L Diesel · J123 BBD

The vehicle most recently passed its MOT on 26 January 2026, but the overall maintenance trend is concerning as it indicates a pattern of deferred maintenance. Several advisories regarding brake wear and suspension play have persisted or expanded over the last three years without apparent rectification. The progression from a single faulty ball joint to both sides, combined with brake pads that have been flagged as thin across multiple tests, suggests the vehicle has been maintained to a minimum legal standard rather than a preventative mechanical standard. With a recorded mileage of 54,871 miles over approximately six years, the vehicle has averaged roughly 9,145 miles per annum. This is considered typical usage for a premium SUV of this class and suggests a balanced duty cycle of mixed urban and motorway driving. There are no significant gaps in the mileage record to suggest long periods of standing, meaning the primary mechanical concerns will relate to standard wear and tear of consumables rather than degradation from inactivity. Prospective buyers should prioritise a thorough inspection of the braking system and front suspension. The recurring advisories for thin front brake pads and worn or pitted discs indicate that a full front brake overhaul is now imminent. During a test drive, listen for any metallic grinding or feel for vibrations through the steering wheel under heavy braking, which would confirm advanced disc wear. Furthermore, the reported play in both nearside and offside front suspension arm ball joints is a critical point of attention. Listen for knocking or clunking sounds when traversing uneven road surfaces or during low-speed manoeuvring, as these components are essential for steering precision and safety. Attention must also be paid to the tyre condition and wheel alignment. The history of tyres being worn close to the legal limit, specifically on the edges, often points to incorrect tracking or worn suspension components affecting the contact patch. Inspect the current tyre sidewalls for cracking and check the tread depth across the full width of the tyre to ensure no uneven wear remains. Finally, verify the service history to determine if the recurring MOT advisories were ever addressed by a technician, as the lack of resolution between annual tests suggests a reactive approach to vehicle upkeep that may hide other neglected service items.