2009 Mercedes-Benz B-Class 2.0L Diesel · KR09 FFV

OVERALL VERDICT: The most recent recorded MOT test resulted in a pass on 29 April 2022 at 155,352 miles, following a failure two days prior for fractured rear coil springs and a deteriorated offside front constant velocity boot. The maintenance trend between 2020 and 2022 demonstrates a clear deterioration in suspension and drivetrain integrity. Rear spring corrosion noted in June 2021 progressed to complete fracture by April 2022, while the offside front constant velocity boot repeatedly failed inspection across three consecutive tests. Crucially, no official test data exists for the past four years relative to June 2026, meaning the current mechanical condition and legal roadworthiness cannot be verified from records alone. MILEAGE & WEAR PROFILE: At approximately seventeen years old with 155,352 recorded miles, the vehicle has averaged roughly 9,100 miles per year, which aligns with typical domestic usage. The accumulation of 14,480 miles between June 2020 and April 2022 indicates regular operation during that period, placing commensurate load on suspension bushes, dampers, and braking components. However, the complete absence of test data since April 2022 creates significant ambiguity regarding recent usage patterns. Prolonged inactivity or unrecorded high-mileage driving over the last four years would accelerate degradation of rubber seals, fluid integrity, and corrosion-prone structural areas, particularly given the vehicle age and previous spring failures. CRITICAL IN-PERSON CHECKS: A comprehensive physical inspection must prioritise the offside front driveshaft assembly, as the constant velocity boot has demonstrated a persistent failure pattern that likely compromises the joint bearings and requires shaft replacement. Both rear coil springs and their mounting turrets require close examination for renewed corrosion or fatigue cracking, given their documented fracture history. The front anti-roll bar drop links and suspension bushings should be assessed for play and perished rubber, following their 2020 failure. Due to the consistent fitting of under trays and sill trims, these covers must be removed to inspect the floorpan, sills, and subframe mounting points for concealed structural corrosion. Finally, a full brake system evaluation, fresh emissions test, and verification of all fluid conditions are essential before considering the vehicle roadworthy.