2014 Mercedes-Benz B-Class 1.8L Diesel · FD14 ULN

The vehicle’s most recent MOT history reveals a concerning pattern of instability rather than consistent roadworthiness. The January 2026 test cycle alone shows two consecutive failures and a pass within a week—no defects were recorded in any of these tests, but the repeated retesting suggests either administrative delays or unresolved underlying issues that were not mechanically flagged. The absence of advisories or defects across all five tests implies the tester did not identify any major mechanical failings, yet the retests themselves raise questions about whether minor issues were overlooked or whether the vehicle was simply driven between tests without significant deterioration. For a vehicle of this age and mileage, this erratic testing history is unusual and warrants further scrutiny. The recorded mileage progression of approximately 8,600 miles per year aligns with typical usage for a 12-year-old vehicle, though the data is sparse enough that seasonal or irregular driving patterns cannot be ruled out. The gap between the 2024 and 2025 tests—covering 12,680 miles in a year—does not stand out as unusually high, nor does the final stretch to the 2026 tests, which added another 18,324 miles. Without a more granular history, it is impossible to determine whether the vehicle was stored for extended periods or driven consistently. The lack of advisories or defects across all tests suggests no obvious neglect, but the repeated retests in early 2026 imply either a lack of pre-test preparation or a tendency to defer maintenance until the last possible moment. Given the absence of recorded defects, a buyer should prioritise a thorough inspection of high-wear components that are not typically captured in a standard MOT. The suspension—particularly the rear bushes and coil springs—should be checked for excessive play or corrosion, as these are common failure points in this class of vehicle. Brake calipers and discs should be inspected for binding or uneven wear, especially if the vehicle has been driven hard or stored with wet brakes. The exhaust system warrants attention for leaks or rust penetration, particularly around flanges and joints, given the vehicle’s age. Structural integrity of the subframe and body panels should also be assessed, as hidden corrosion can compromise safety without being visible during a basic MOT. Finally, the electrical system—including lights, sensors, and the ABS system—should be tested, as intermittent failures could explain the retesting without mechanical defects.