2021 Mercedes-Benz GLC 300 AMG Line Prem + D 4M A 1.9L Diesel · GV 1270

The 2021 Mercedes-Benz GLC 300 AMG Line presents a most encouraging official MOT history, having passed both recorded tests at the DVSA on 9 May 2024 and 1 May 2025 without any advisories or defects recorded against the vehicle. This represents two consecutive clean test outcomes under the current pass/failure advisory MOT regime, indicating that at the time of examination there were no items identified as requiring attention, monitoring, or rectification. Given the vehicle is now five years old and approaching its first mandatory test threshold for further record building, the absence of any recorded advisories at the most recent examination is a strong indicator that the braking system, tyres, suspension, exhaust emissions, lighting, and structural integrity were all in satisfactory condition at that point. While a clean MOT history cannot guarantee the mechanical condition of internal service items not assessed under the test, it does establish a stable and well-maintained trend, suggesting that the previous keeper was attentive to roadworthiness and that no systemic deterioration has yet emerged on the wear items inspected. Turning to the recorded mileage of 32,816 miles on a five-year-old vehicle, this equates to an annual accumulation of approximately 6,563 miles per year, which sits firmly within the typical usage bracket for a premium mid-size SUV of this class. Such a mileage profile suggests consistent but moderate use, likely comprising a mixture of daily driving, longer journeys, and motorway mileage. This pattern of use is mechanically favourable because regular sustained running keeps the engine, turbocharger, diesel particulate filter, transmission, and drivetrain components warm and well-lubricated, reducing the risk of internal corrosion, oil glazing, and DPF saturation that can afflict vehicles used predominantly for short trips. However, even moderate annual mileage means that consumable wear items such as brake pads and discs, tyres, and wiper blades will have experienced normal progressive wear, and the diesel engine will have accumulated considerable running hours relative to a lower mileage example. There are no significant gaps in the mileage between tests, with the figure appearing consistent with continuous regular use rather than long periods of standing. For a prospective buyer, although the MOT record is immaculate, a thorough physical inspection remains essential given the vehicle's age and the fact that the MOT test does not cover engine condition, internal transmission wear, or non-structural service items. Particular attention should be directed toward the age-sensitive items that deteriorate with calendar time irrespective of mileage, including perishing or cracking of the tyre sidewalls, which can occur even on tyres with adequate tread depth due to UV exposure and ozone degradation over five years; the 12-volt battery, which on modern Mercedes-Benz vehicles is a maintenance-free AGM type typically requiring replacement between years four and six, particularly if the vehicle has been subject to short-trip usage; and the brake discs, which can exhibit corrosion ridges or pitting from standing or infrequent heavy braking. The brake fluid should also be verified as being within its two-year service interval, as hygroscopic moisture absorption can degrade boiling point and ABS modulator performance well before the next scheduled MOT. On a test drive, the prospective buyer should listen carefully for any clonking or knocking from the front suspension, which could indicate wear in the lower control arm bushes, anti-roll bar drop links, or top mount bearings, all known wear items on GLC models; any vibration through the steering wheel or brake pedal under heavy braking, which would suggest disc warpage often linked to corrosion or thermal distress; and any hesitation, juddering, or unusual noises from the automatic transmission during light throttle changes, particularly around the 9G-Tronic unit, which can exhibit torque converter shudder if the fluid has not been changed at the prescribed intervals. The diesel particulate filter should be exercised on a sustained motorway run of at least twenty minutes to confirm it reaches regeneration temperature and does not trigger a warning, and the AdBlue system should be checked for adequate level and any stored fault codes. Finally, verification of full Mercedes-Benz service history, including digital service records on the MBUX system, with particular confirmation that the diesel particulate filter, automatic transmission fluid, and brake fluid have all been renewed in line with the manufacturer's ASSYST PLUS schedule, will provide essential assurance that the vehicle has been maintained to manufacturer standards rather than purely to MOT pass criteria.