2016 Mercedes-Benz A-Class 1.5L Diesel · LS16 HBA

The latest MOT test in April 2026 resulted in a pass, but only after an initial failure due to excessive play in the nearside front track rod end ball joint, which was rectified. The trend shows a mix of stability and emerging concerns, with advisories for oil leaks, tyre cracking, and steering rack play recurring across tests. The 2025 failure for a supplementary restraint system warning lamp and insufficient washer fluid suggests intermittent electrical or sensor issues, while the 2024 advisories for offside tyre wear and corroded rear brake discs indicate neglect of consumables. Overall, the maintenance trend appears reactive rather than proactive, with defects addressed only when they escalate to failure points. At 45,189 miles over ten years, the annual mileage averages just 4,519 miles, which is very low for a vehicle of this age. Prolonged periods of inactivity or short, infrequent journeys can lead to issues such as fluid degradation, brake disc corrosion, binding calipers, and perished rubber components. The low usage may explain the preservation of some mechanical parts but also raises concerns about standing-related deterioration, particularly in seals, gaskets, and suspension bushes, which can harden or crack over time regardless of mileage. The recurring advisories for oil leaks and steering rack play demand close inspection. On a test drive, listen for clunks or excessive movement from the steering system, particularly over uneven surfaces, as this could indicate worn ball joints or steering rack mounts. Check for fresh oil stains under the engine bay and inspect the nearside rear tyre for deep cracking or perishing, which compromises structural integrity and increases the risk of a blowout. The nearside front track rod end ball joint, recently replaced, should be verified for proper torque and absence of play, as premature wear could reoccur if alignment or suspension geometry is incorrect. Given the vehicle’s age and low mileage, pay particular attention to time-based degradation. Inspect all tyres for sidewall cracking, as rubber compounds degrade over time even with minimal use. Test the 12V battery health, as low-mileage cars often suffer from undercharging due to short trips. Check brake discs for surface corrosion or pitting and ensure calipers are not binding, which can cause uneven pad wear or drag. Verify service history for timely fluid changes, particularly engine oil, coolant, and brake fluid, as these degrade with age. Finally, confirm the supplementary restraint system warning lamp is now extinguished and test the washer system to ensure consistent fluid delivery, as these were previous failure points.