2014 Mercedes-Benz ML 2.1L Diesel · WD14 FHC

The most recent DVSA MOT test for this 2014 Mercedes-Benz ML occurred on 2025-11-21, resulting in a passing outcome with multiple advisories rather than outright failures. While the vehicle passed this test, the previous MOT on the same date in November 2025 resulted in a failure due to an active engine malfunction indicator lamp (MIL) issue, alongside the persistent tyre wear advisories. This inconsistency suggests a potential underlying mechanical concern that may have been addressed or mitigated during the intervening months, but the recurring tyre wear advisories indicate a pattern of significant tyre degradation that warrants careful consideration. The earlier clean MOTs in 2022 and 2023, along with the single failure in 2025, suggest that while the vehicle has maintained roadworthiness in most respects, the engine system and tyre wear remain areas of concern that require thorough investigation before purchase. The recorded mileage of 119,628 miles for a vehicle aged approximately 12 years represents a moderate annual usage rate of around 9,969 miles per year, which is within the expected range for this model’s age and typical driving conditions. This mileage accumulation is neither exceptionally high nor unusually low, but it does imply consistent use rather than prolonged periods of inactivity. Higher mileage over time can accelerate wear on critical components such as suspension bushes, brake pads, and tyre tread, while lower mileage might suggest less aggressive driving or more frequent standing, which can lead to issues like brake disc corrosion, fluid degradation from stagnation, or tyre sidewall perishing. The absence of significant mileage gaps in the MOT history suggests that the vehicle has been regularly driven, which may have contributed to the observed tyre wear patterns and potential engine-related concerns. Given the recurring tyre wear advisories—particularly the edge wear and inner shoulder wear on all four tyres—this is a critical issue that demands immediate attention. Edge wear often indicates improper alignment, underinflation, or excessive camber angles, which can lead to uneven tyre degradation and increased risk of blowouts. Inner shoulder wear, on the other hand, is typically a sign of overinflation, excessive speed, or aggressive cornering. On a test drive, listen for uneven tyre noise, check for visible cracks or bulges in the sidewall, and ensure the vehicle maintains straight-line stability without excessive pulling to one side. If the tyre wear is confirmed to be severe, consider replacing the tyres promptly, as further wear could compromise road safety and void insurance coverage. Additionally, address any suspected alignment or suspension issues that may be contributing to the wear pattern. Beyond the tyre concerns, the engine MIL failure in the 2025 MOT indicates that the vehicle’s diagnostic system is detecting an active fault, which could stem from a range of issues such as a faulty sensor, wiring problem, or deeper engine component failure. This is not a roadworthy failure but an advisory that must be resolved before the vehicle is legally compliant. The buyer should arrange a professional diagnostic check to pinpoint the exact cause of the MIL, as this could relate to the engine control unit, oxygen sensors, fuel system, or other components. During this inspection, also verify the condition of the engine oil, coolant, and transmission fluid, as these fluids degrade over time and can exacerbate mechanical issues. Given the vehicle’s age and mileage, consider scheduling a comprehensive service that includes a full fluid top-up, filter replacement, and inspection of the suspension, brakes, and exhaust system. For the tyres, inspect the sidewall for signs of perishing or cracking, which can weaken the rubber and reduce longevity, especially if the vehicle has been stored for extended periods. Lastly, check the 12-volt battery health and ensure all electrical connections are clean and secure, as standing vehicles can lead to corrosion or dead batteries over time.