2015 Mercedes-Benz A-Class 1.5L Diesel · WH05 BTT

Critical safety failures regarding tyre tread depth and electronic systems define the current mechanical state of this Mercedes-Benz A-Class, following a failed MOT on 05 September 2026. The recent test recorded dangerous defects involving three tyres with tread depths below the 1.6mm legal limit, alongside major failures for a malfunctioning tyre pressure monitoring system and a fault within the supplementary restraint system warning lamp. This represents a significant decline in roadworthiness compared to the 2025 pass, moving from a clean record to multiple high-risk failures in a single testing cycle. The vehicle has covered 87,312 miles over its eleven-year lifespan, averaging approximately 7,937 miles per year. This usage pattern is consistent with typical annual accumulation for a vehicle of this age. While the mileage does not suggest extreme high-speed motorway use or heavy commercial utility, the intermittent history of brake and tyre defects suggests that wear on consumables has occurred in concentrated intervals rather than through steady, incremental maintenance. Prospective buyers should pay close attention to the braking system and tyre condition during a physical inspection. The history shows recurring issues with brake pad thickness and pitted or scored brake discs, specifically noted in 2022 and 2023. On a test drive, check for any pedal judder or vibration under braking, which can indicate warped or unevenly worn discs, and listen for any squealing or grinding noises that may signal worn pads or binding calipers. The recent failure of the supplementary restraint system lamp is a major concern; ensure the airbag warning light extinguishes as normal after the engine is started, as a persistent light indicates a fault in the safety deployment system. The recent tyre-related failures and previous advisories regarding sidewall damage and perishing suggest that the vehicle's rubber components require immediate scrutiny. Beyond checking the current tread depth, inspect the sidewalls of all tyres for bulging, cracking, or visible damage to ensure they meet safety standards. Given the failure of the tyre pressure monitoring system, verify that the dashboard displays accurate pressures for all wheels. Any uneven wear on the outer edges of the tyres, as flagged in previous years, should be investigated for potential wheel alignment issues or suspension bushing wear, which may manifest as a steering pull or uneven handling during a test drive.