2016 Mercedes-Benz A-Class 2.1L Diesel · YN66 OME

The most recent MOT test on 2025-12-16 resulted in a clean pass with no recorded defects, though the vehicle’s history includes a single failure in 2024-12-04, where the supplementary restraint system warning lamp indicated a fault in the airbag control unit and an advisory for excessive play in the nearside front inner tie rod. This failure stands out as an outlier, suggesting either a one-off issue or a potential recurring problem with the airbag system or steering linkage. The subsequent MOTs from 2023 onwards have all passed without defects, indicating a stable maintenance trend post-failure, though the tie rod advisory remains a critical point of concern. The absence of further failures or advisories in the intervening years implies that the original issue may have been resolved, but the play in the tie rod—if persistent—could still pose long-term risks to steering alignment and vehicle handling. The vehicle’s recorded mileage of 71,660 miles at the time of this assessment represents a moderate annual usage rate of approximately 7,166 miles per year, which is typical for a 10-year-old car driven under normal conditions. Given the age and mileage, the car has likely accumulated wear on consumables like brake pads, suspension components, and drivetrain elements, though the consistent mileage suggests steady, not excessive, usage. There are no evident gaps in service history or signs of prolonged idling, which could exacerbate issues such as corrosion or fluid degradation. However, the tie rod advisory and the prior airbag warning highlight areas where wear or failure could progress with continued use, particularly if the vehicle is driven regularly or subjected to harsh conditions. For a prospective buyer, the most urgent inspection should focus on the nearside front inner tie rod, as excessive play could indicate progressive damage to the ball joints, bushings, or the rod itself. During a test drive, listen for clunking or rattling noises when driving over bumps or at speed, as these may signal loose or worn suspension components. Additionally, check for uneven tyre wear patterns, which could imply misalignment caused by the tie rod issue. The supplementary restraint system warning from the 2024 failure suggests that the airbag control unit or wiring harness may need verification, though the absence of further failures implies it may be functioning correctly now. Inspect the front suspension for signs of corrosion or binding, particularly around the strut mounts and control arms, as standing for extended periods can accelerate rusting. Beyond these critical areas, given the vehicle’s age and mileage, a thorough physical inspection should include checking the tyre sidewalls for signs of perishing or cracking, which can weaken the structure and compromise safety. The 12V battery should be tested for voltage output and overall health, as older vehicles are more susceptible to failure from prolonged disuse or high mileage. Inspect the brake system for signs of corrosion on discs or binding calipers, especially if the vehicle has been stationary for prolonged periods, as this can lead to reduced braking performance. Fluid levels—particularly the engine oil, brake fluid, and coolant—should be checked for contamination or degradation, with a recommendation to replace fluids that have exceeded their service life, typically every 60,000 to 100,000 miles or every 5 to 7 years, depending on the manufacturer’s guidelines. Finally, verify that the service book is up to date, as the absence of recorded service stamps may indicate missed maintenance, which could reveal underlying wear or potential future issues.