2015 Mercedes-Benz A-Class 1.5L Diesel · TP03 DAP

The most recent MOT test on the 2015 Mercedes-Benz A-Class was conducted on 2026-07-29 and resulted in a clean pass, indicating no defects were recorded. However, the vehicle’s MOT history reveals a pattern of recurring advisories and a single major failure, suggesting that while the car has maintained roadworthiness, there are underlying issues that require closer attention. The advisories on tyre wear—particularly the front tyres being worn close to the legal limit and showing edge wear—have been consistent since 2022, indicating either aggressive driving habits, misalignment, or poor wheel balancing. The major failure in 2023 highlighted a critical issue: a fractured or broken offside rear coil spring, which is a severe structural component failure that can lead to instability, uneven suspension travel, and potential road hazard if left unaddressed. The fact that this defect was not rectified before the 2024 MOT suggests either a lack of timely maintenance or a failure to prioritise the repair, which could now pose a long-term risk to the vehicle’s handling and safety. The vehicle’s recorded mileage of 78,455 miles over approximately 11 years represents an average annual usage of around 7,132 miles, which is within the expected range for a car of this age and class. However, the MOT history does not provide explicit details on the periods between tests, but the consistent advisories on tyre wear and sidewall cracking—particularly on the rear tyres—could imply either prolonged periods of low usage or exposure to harsh conditions that accelerate wear. Tyre sidewall perishing is a calendar-based issue, not strictly mileage-dependent, and can occur even with moderate usage if the tyres have been stored or used in extreme temperatures. The presence of edge wear on the front tyres suggests that the vehicle may have been driven with incorrect tyre pressures or alignment, which can exacerbate uneven wear patterns over time. The absence of higher mileage spikes in recent years does not necessarily mean the car is well-maintained, as the spring failure indicates that some components have reached their operational limits despite the vehicle’s relatively moderate mileage. For the prospective buyer, the most critical areas to inspect immediately are the rear suspension and tyre condition. The history of a fractured coil spring highlights the need for a thorough examination of the rear suspension system, including the remaining coil springs, shock absorbers, and associated mounting components. Listen for any unusual clunking or rattling when driving over bumps, as this could indicate further suspension bush wear or binding. The front tyres, particularly those showing edge wear, should be checked for alignment and wheel balancing, as misalignment can cause progressive tyre damage. If the tyres are close to the legal limit, consider replacing them before they reach the minimum tread depth, as worn tyres compromise traction and safety. The rear tyres, which have shown sidewall cracking, should be inspected for any signs of internal damage or blistering, which could lead to sudden failure. Additionally, check for any fluid leaks around the suspension components, as oil leaks from the coil springs or shock absorbers can accelerate their failure. Beyond the mechanical checks, the buyer should also assess the vehicle’s battery health, given the age and usage profile. A 12V battery in a 11-year-old car is likely nearing the end of its lifespan, and a weak battery can lead to starting issues or electrical system failures. Test the battery voltage when the engine is off (should be around 12.6V) and when the engine is running (should be around 13.8–14.4V). If the voltage is significantly lower, the battery may need replacement. Given the vehicle’s age, it is also advisable to check the service history for time-based fluid servicing, such as the coolant, brake fluid, and transmission fluid, which should have been replaced according to the manufacturer’s schedule. The coolant should be checked for contamination or sludge, and the brake fluid should be flushed if it has been more than 2–3 years old, as it can absorb moisture and degrade over time. Finally, verify that the service book or dealer records confirm that the oil changes and other essential maintenance tasks have been completed, as a well-documented service history can provide reassurance about the vehicle’s condition.