2018 Mercedes-Benz A-Class 1.5L Diesel · LO67 WPZ

The most recent MOT test on 2025-02-17 resulted in a passing outcome, though it included two persistent advisories—one on the near-side front tyre showing wear close to the legal limit and edge wear, and another on the offside rear tyre exhibiting signs of cracking or perishing. This pattern of advisories, appearing in the last two MOTs, suggests a gradual but concerning progression of tyre degradation rather than a sudden failure. While the earlier MOTs in 2023 and 2022 were clean, the recurrence of these issues indicates a maintenance trend that requires careful monitoring rather than one that is either improving or worsening at this stage. The fact that these advisories are not failures means the vehicle remains roadworthy, but the wear patterns demand proactive attention to prevent further reduction in tyre life or safety risks such as blowouts or hydroplaning. The vehicle’s recorded mileage of 70,040 miles at the time of this assessment represents a reasonable annual usage rate of approximately 8,755 miles, which is typical for an eight-year-old A-Class given its age and market conditions. This mileage distribution does not suggest either excessive wear from high annual mileage or prolonged idling, which could accelerate corrosion or fluid degradation. However, the absence of service records or a service booklet means the vehicle’s actual maintenance history remains speculative. Without documented service intervals, it is impossible to confirm whether consumables like brake fluid, coolant, and transmission fluid have been replaced according to Mercedes-Benz’s recommended service schedule, which for this model typically spans 60,000 to 100,000 miles or every two years. The stability in mileage accumulation does not mitigate the need for a thorough inspection of high-mileage components such as the drivetrain, suspension, and exhaust system, where wear can accelerate with prolonged use. Given the recurring tyre advisories, the prospective buyer should prioritise a detailed inspection of the tyres, focusing on the near-side front tyre for signs of uneven wear, tread depth, and sidewall integrity. The front tyre’s edge wear may indicate alignment or steering system issues, such as camber or toe problems, which could exacerbate further tyre wear or compromise handling. On a test drive, listen for unusual noises from the front wheels, such as clunking or dragging, which could signal misaligned wheels or binding calipers. The offside rear tyre’s cracking or perishing is a critical concern, as tyre perishing can lead to sudden failure, posing a significant safety risk. Inspect the tyre for any signs of internal damage, such as blisters or delamination, and ensure the tread depth is maintained above the legal minimum of 1.6mm. Additionally, check the vehicle’s suspension for signs of wear, such as stiff or clunking suspension bushes or coil springs that may have degraded over time, which could contribute to uneven tyre wear. Beyond the tyres, the buyer should conduct a comprehensive inspection of the vehicle’s standing corrosion, particularly around the undercarriage, wheel arches, and door sills, where moisture and road salt can accelerate rust formation. Given the vehicle’s age and the potential for prolonged idling, inspect the brake system for signs of corrosion on the discs or binding calipers, which can lead to reduced braking performance or failure. Test the brakes by applying firm pressure during a slow deceleration to check for any shuddering, vibration, or excessive heat buildup. The 12V battery should also be evaluated for health, as prolonged disuse can lead to sulphation or internal failure, which may not be apparent during a test drive. Finally, since the vehicle has not undergone a full service in recent years, consider having the coolant, brake fluid, and transmission fluid replaced according to manufacturer guidelines, as these fluids degrade over time even when not used. A professional inspection or pre-purchase appraisal would be advisable to confirm the absence of hidden mechanical issues, such as drivetrain wear or exhaust emissions system faults, which may not be flagged by the MOT but could impact long-term reliability.