2012 Mercedes-Benz B-Class 2.1L Diesel · FR12 VFW

The most recent MOT test on 2025-11-03 confirms the vehicle passed without defects, though it follows an unusual sequence of a failed test just four days earlier on 2025-10-27—an anomaly that suggests either a temporary administrative error or a minor oversight in the test itself. The preceding tests in 2024 and 2023 all passed cleanly, indicating no recurring mechanical failures were recorded. However, the double entry on 2023-10-13—one pass and one fail—raises suspicion, as such duplicates are rare and may imply either a data error or a vehicle that narrowly avoided failure on that occasion. Without specific defect details from the failed tests, the trend appears stable in terms of MOT compliance, but the irregularities warrant closer scrutiny of components prone to late-stage wear, particularly if the vehicle was driven between those tests. The recorded mileage of 99,016 miles over 14 years suggests an average of approximately 7,073 miles per year, which is typical for a vehicle of this age. There are no obvious gaps or spikes in usage, though the lack of intermediate MOTs between 2023 and 2024—an 11-month gap—could indicate either consistent annual testing or a period where the vehicle was not in regular use. The most recent test was conducted just seven months ago, which is within the standard 12-month MOT validity window, but the abrupt fail-to-pass sequence in late 2025 is unusual and may signal a brief but critical issue that was either corrected or overlooked. Given the sparse defect history, a buyer should prioritise an inspection of high-wear components that often go unnoticed until they fail. The suspension—particularly the rear coil springs and bushes—should be examined for uneven wear or corrosion, as these are common points of failure in Mercedes-Benz models of this era. Brake systems, including rear binding calipers and front disc thickness, should be checked for uneven wear or corrosion, especially if the vehicle was driven between the 2025 tests. Structural integrity of the underbody and wheel arches should also be assessed for signs of rust or damage, as the B-Class is susceptible to corrosion in these areas. Finally, the exhaust system and emissions components should be inspected for leaks or excessive smoke, as these are frequently flagged in MOTs for similar vehicles. The lack of recorded defects does not guarantee these areas are sound, so a thorough mechanical assessment is essential.