2021 Mercedes-Benz GLB 200 AMG Line Auto 1.3L Petrol · OV21 FXR

This Mercedes-Benz GLB 200 AMG Line has demonstrated a stable roadworthiness trend over the past three MOT cycles, though the most recent test on 2026-04-09 resulted in a failure—an unusual anomaly given the preceding two consecutive passes. The absence of recorded defects in the 2025 and 2024 tests suggests the vehicle was mechanically sound during those periods, but the 2026 failure, occurring just four months before today, raises immediate questions about what specific issue caused the test to fail. Given the lack of defect details, this failure cannot be attributed to a predictable wear pattern, which makes it harder to assess whether it was a one-off oversight or an emerging problem. The recorded mileage of 62,455 miles over approximately five years—roughly 12,491 miles annually—indicates unusually high usage for a vehicle of this age. Comparing the 2024 and 2025 MOT dates (16 April 2024 to 28 March 2025) shows a mileage increase of 12,300 miles in just over a year, a rate that accelerates wear on high-stress components like suspension bushes, coil springs, and brake calipers. The gap between the 2025 pass and the 2026 failure—just over a year—also suggests the vehicle was driven consistently during this period, which could contribute to accelerated degradation of consumable parts. There are no visible gaps in testing that might indicate prolonged neglect, but the high mileage per year implies the previous owner prioritised usage over meticulous maintenance. Given the sparse MOT record and the high mileage, a prospective buyer should prioritise an independent inspection of the suspension system, particularly the rear axle components, as binding or worn bushes or springs are common in high-mileage AMG models. The brakes, given the aggressive driving style implied by the mileage, should be thoroughly checked for uneven wear, binding calipers, or excessive corrosion on the discs—especially if the vehicle was driven in wet or salted conditions. Structural integrity of the chassis and subframe should also be assessed for signs of fatigue or corrosion, particularly around the wheel arches and sills, where high mileage can accelerate deterioration. The 2026 failure, though unexplained, warrants scrutiny of the exhaust system, emissions components, or electrical faults that might have triggered the test failure. Given the lack of defect details, a pre-purchase diagnostic scan would be advisable to uncover any hidden issues.