2021 Mercedes-Benz GLB 220 AMG Line Prem D 4M A 1.9L Diesel · LP70 ABK

The most recent MOT on 17 April 2025 was a clean pass, following another pass on 27 March 2024. The earlier test on 9 February 2024 recorded a failure despite no specific defects being listed, which usually points to an administrative issue such as a mileage discrepancy or a missed advisory. In the absence of recorded faults the overall maintenance trend appears stable, but the unexplained failure warrants clarification from the current keeper before proceeding. At 45,942 miles the GLB is roughly five years old, giving an average annual mileage of about 9,200 miles. This figure sits comfortably within the typical UK usage pattern and does not suggest excessive wear on high‑stress components such as the transmission, clutch or drivetrain. However, the relatively modest mileage also means that many rubber and polymer parts have aged more by calendar time than by use, so age‑related degradation should be inspected rather than mileage‑driven wear alone. The buyer should first obtain the full MOT failure report for February 2024 and confirm the reason with the seller. A thorough visual inspection of the suspension is essential – check the condition of the front and rear bushes, coil springs and any anti‑roll bar links for cracking or excessive play, and listen for clunking when the wheels are rocked. The braking system should be examined for pad thickness, disc surface condition and any uneven wear that could indicate a binding caliper; the pedal should feel firm with no pulsation. Tyres must be measured for tread depth and inspected for sidewall cracking or perishing, as older tyres can deteriorate even with low mileage. Under‑body corrosion, especially around the wheel arches and chassis rails, should be assessed, and the 12 V battery tested for cranking amperage and electrolyte condition given the vehicle’s age. During a test drive, pay close attention to steering feedback, any noises from the front or rear suspension, and the behaviour of the brakes under moderate and heavy application. Watch for any smoke or unusual exhaust notes that could hint at engine wear, and verify that all electronic aids – including the AMG Line driver assistance features – operate correctly. A pre‑purchase inspection by a qualified mechanic, including a check of service book stamps, fluid condition (engine oil, brake fluid, coolant) and confirmation that any outstanding recalls have been addressed, will provide the most reliable assurance of roadworthiness.