2021 Mercedes-Benz GLB 220 AMG Line Prem D 4M A 1.9L Diesel · KB60 PAB

The most recent DVSA MOT test on the 2021 Mercedes-Benz GLB 220 AMG Line Premium D 4M A was conducted on 2026-03-28, resulting in a pass, though it revealed persistent advisories that indicate ongoing wear and potential long-term concerns. The vehicle’s MOT history shows a pattern of recurring issues, particularly with brake components and tyre condition, which suggests that maintenance may not have been fully addressed between tests. The failure in 2024-03-23 highlighted a severe tyre defect—an offside rear inner tyre with a cut reaching the ply or cords—a critical failure that would have rendered the vehicle unsafe if not rectified. While the 2025 and 2026 MOTs passed, the advisories on brake pad wear, disc condition, and tyre edge wear indicate that the vehicle has not been maintained to prevent further deterioration. This trend of unresolved wear advisories points to either inadequate servicing or a higher-than-expected rate of component failure, warranting careful scrutiny during inspection. The recorded mileage of 73,040 miles for a 2021 model represents a usage rate of approximately 14,608 miles annually, which is notably high for its age. High mileage, particularly over five years, accelerates wear on consumables such as brake pads, tyres, and suspension components, as well as potential stress on drivetrain elements like the differential and exhaust system. The absence of significant mileage gaps suggests the vehicle has been in regular use, which could explain the wear observed in the MOT history. However, the rapid accumulation of miles may also indicate aggressive driving habits, frequent short trips that lead to cold-start wear on brakes and fluids, or exposure to harsh road conditions. Buyers should be aware that such usage patterns can accelerate the degradation of critical systems, particularly those already showing advisories in the MOT records. Given the vehicle’s age, mileage, and the recurring advisories in the MOT history, the buyer should conduct a thorough mechanical inspection to assess the severity and progression of the identified defects. Focus on the brake system: visually inspect the front and rear brake discs for warping, glazing, or excessive thickness loss beyond the advisories noted; check for binding or excessive play in the calipers, which could indicate warped discs or seized hydraulic components. Listen for abnormal brake noise—screeching (indicating glazed discs) or grinding (suggesting metal-on-metal contact)—and test the brake pedal for firmness and pedal travel. The tyres, particularly the offside rear inner tyre that failed the MOT, should be closely examined for remaining tread depth, sidewall damage, and signs of uneven wear patterns that could signal alignment or suspension issues. Additionally, inspect for any fluid leaks around the wheel arches, brake calipers, or suspension mounts, as these could indicate failing seals or seals that have degraded from prolonged exposure. Beyond the MOT advisories, the buyer should also address broader maintenance checks appropriate for the vehicle’s age and usage profile. Given the high mileage, verify the condition of the engine oil, transmission fluid, and differential fluid, ensuring they are fresh and free of contaminants, as these fluids degrade over time and can lead to premature component failure. Check the coolant system for leaks or signs of overheating, which could exacerbate wear on the engine and transmission. Inspect the exhaust system for rust, leaks, or excessive emissions, as the high mileage may have contributed to corrosion in the catalytic converter or muffler. For the suspension, look for signs of worn suspension bushes, coil spring sagging, or excessive play in the control arms, as these can lead to poor handling and increased tyre wear. Finally, since the vehicle has been in use, consider a check of the 12-volt battery and starter motor, as prolonged periods of disuse or high demand can lead to battery failure or electrical system issues. If the vehicle has been left stationary for extended periods, inspect for corrosion on the battery terminals, brake discs, and exhaust system, as standing fluid can accelerate rust formation.