2021 Mercedes-Benz GLC 300 AMG Line Prem D 4M A 1.9L Diesel · WM70 FDU

The latest MOT test on 13 August 2026 passed with no defects recorded, indicating the vehicle currently meets roadworthiness standards. Reviewing the broader history, the 2025 test revealed minor and advisory items—specifically a non-functioning segment of the offside rear fog lamp and both rear tyres approaching the legal wear limit—which were not repeated in 2026. This suggests a stable or improving maintenance trend, with the previous advisories likely addressed through component replacement or adjustment. At 37,017 miles over five years, the annual average of approximately 7,400 miles is consistent with moderate usage for a vehicle of this age and class. There are no indications of prolonged inactivity or excessive mileage accumulation, which reduces the likelihood of severe wear on major mechanical components. However, the mileage remains sufficient to warrant close inspection of consumables such as brakes, suspension bushes, and drivetrain fluids, which degrade with both time and distance. The 2025 advisories for rear tyre wear close to the legal limit should prompt a thorough inspection of the current tyre condition, even though they passed in 2026. Check for uneven tread wear patterns, which may indicate suspension misalignment or incorrect tyre pressures, and listen for excessive road noise or vibration at speed. Additionally, verify the rear fog lamp is now fully operational, as partial failures can worsen over time. Given the vehicle’s age, inspect the tyre sidewalls for cracking or perishing, which can occur regardless of mileage, and assess the 12V battery health, as auxiliary systems in modern Mercedes-Benz models can drain the battery if the vehicle stands unused for extended periods. Finally, consider the calendar-based degradation of fluids and components. At five years old, the brake fluid, coolant, and automatic transmission fluid may require renewal if not already serviced in line with the manufacturer’s schedule. Check for signs of brake disc corrosion or binding calipers, which can develop even with moderate mileage, and listen for clunks or knocks from the suspension over uneven surfaces, which may indicate worn bushes or shock absorbers. A full service history and stamps in the service book will confirm whether time-sensitive maintenance has been carried out.