2014 Mercedes-Benz A-Class 1.5L Diesel · OY14 XOU

The most recent DVSA examination on 21 August 2026 resulted in a fail with a major defect recorded against the driver's airbag, specifically that it was obviously inoperative with the airbag warning lamp illuminated. This is a serious safety-related item that must be rectified before the vehicle can be put back on the road, and it should also prompt verification of the supplementary restraint system as a whole, including the passenger airbag, seatbelt pretensioners, and any associated crash sensors. Looking at the broader MOT history, the trajectory shows a concerning pattern rather than stability or improvement. The 2021 test recorded a major supplementary restraint system warning lamp fault and a dangerous rear brake pad wear defect, and the same supplementary restraint system warning has now reappeared in a different guise five years later, suggesting an intermittent or recurring SRS issue that warrants proper investigation rather than a simple reset. At 81,636 miles over twelve years, this A-Class is accumulating roughly 6,800 miles annually, which is broadly typical for its age and indicates regular driving rather than long periods of standing. The mileage progression is consistent and gradual with no large gaps or sudden jumps, which is generally favourable for component longevity, though the cumulative wear on suspension, braking, and drivetrain consumables should still be assessed in absolute terms. With this mileage, the timing chain, dual-clutch transmission mechatronics (where applicable), turbocharger, and cooling system components are all reaching the stage where original part replacement may be approaching or due. Regarding the advisories on file, the front and rear brake disc wear noted in November 2024 is particularly relevant as discs were recorded as pitted, scored, and lipped on both axles, which is a typical pattern for a vehicle of this mileage and age. On a test drive, listen for brake shudder through the steering wheel or pedal under firm braking, and inspect the discs visually for a pronounced lip on the outer edge and for surface corrosion that may have progressed to pitting. The rear brake pads that were previously flagged as dangerously thin in 2021 are likely to have been renewed, but the discs themselves may still require replacement if they were not changed at the same time, as worn pads accelerate disc wear. The recurring front tyre edge wear advisories from 2020 and 2025 suggest possible tracking misalignment, worn suspension bushes, or weak coil springs, all of which should be checked by jacking the front and checking for play in the wishbone bushes, anti-roll bar drop links, and top mounts. Beyond the recorded items, a prospective buyer of a twelve-year-old Mercedes-Benz with this mileage should perform a thorough physical inspection regardless of the clean-looking advisories. Examine all four tyre sidewalls closely for perishing or cracking from age, as rubber deteriorates with calendar age even if tread depth remains adequate, and check the production date code on the sidewall. Inspect the underside, including the subframe, suspension arms, and brake lines, for corrosion typical of a vehicle that has seen British winters, and verify the condition of the exhaust system including the mounting rubbers which commonly perish. Check the 12V battery health and its date stamp, as batteries of this age are typically approaching the end of their service life. Confirm that the service book contains stamps at appropriate intervals and that the brake fluid, coolant, and automatic transmission fluid (where fitted) have been renewed on a calendar basis rather than purely by mileage, as time-based fluid degradation is a common oversight that can lead to internal corrosion or braking inefficiency. Finally, verify that the airbag recall and any outstanding technical service actions from Mercedes-Benz have been completed, and ensure the SRS warning lamp currently remains extinguished after the recent repair.