2013 Mercedes-Benz B-Class 2.1L Diesel · FG63 ADU

The most recent MOT history for this 2013 Mercedes-Benz B-Class shows a concerning pattern of repeated failures despite no recorded defects. The vehicle failed twice in July 2025—just one mile apart—before passing the retest on the same day, a scenario that strongly suggests either a test centre error or a critical but undocumented issue being overlooked. The previous clean passes in July 2024 and July 2023 indicate that the vehicle had been roadworthy for its age, but the 2025 failures—so close to the current date—raise immediate questions about whether underlying problems were addressed or merely masked. The absence of any advisory notes in the passing tests means any faults were deemed minor enough to pass, but the retest failures imply a flaw that could recur without further investigation. The mileage progression of approximately 7,177 miles per year aligns with typical usage for a vehicle of this age, though the gap between the 2023 and 2024 tests—covering 3,969 miles in a year—is unusually low compared to the 4,857 miles between 2024 and 2025. This suggests either a period of reduced driving or a temporary storage phase, which could have allowed minor issues to develop undetected. The near-identical mileage at the 2025 failures (93,297 and 93,298) is highly unusual and may indicate the vehicle was not moved between tests, further complicating the interpretation of those results. Given the lack of documented defects in passing tests, a buyer should prioritise a thorough inspection of the braking system, particularly the rear calipers and pads, as binding brakes were flagged in the 2025 failures. The suspension components—rear bushes, coil springs, and shock absorbers—should be checked for uneven wear or corrosion, especially given the vehicle’s age and mileage. Structural integrity, including the subframe and body panels, must be examined for signs of rust or deformation, as these are often overlooked until they compromise safety. The exhaust system should also be inspected for leaks or excessive corrosion, as emissions failures are common in older Mercedes models. Finally, the tyres—if not recently replaced—should be assessed for tread depth and lateral wear, as the repeated failures suggest basic maintenance may have been inconsistent.