2017 Mercedes-Benz C 2.0L Petrol · LG 6743

The most recent MOT test on 2025-09-09 resulted in a clean pass, marking a positive turnaround from the previous test on 2025-09-03, which had failed due to a persistent engine malfunction indicator light (MIL) and additional advisories. While the 2025 failure highlighted critical issues such as the engine control system’s inoperability and a malfunctioning tyre pressure monitoring system (TPMS), the subsequent clean pass suggests either a resolution of the underlying engine problem or a temporary anomaly that did not recur. The earlier advisory of slight play in the offside front track rod end ball joint in 2025-09-03 indicates a developing mechanical concern, though it did not result in a failure, implying it may have been addressed or was of lesser severity than the engine-related issues. The MOT history otherwise remains stable, with no further failures or major defects recorded since 2024, reinforcing the vehicle’s overall roadworthiness trend as largely consistent over the past three years. The vehicle’s recorded mileage of 57,802 miles at the time of this assessment represents a reasonable annual usage rate of approximately 6,422 miles per year, which is typical for a nine-year-old car driven in moderate conditions. Lower mileage could reflect periods of inactivity or less frequent use, whereas higher mileage might suggest more aggressive driving or extended exposure to wear. Given the mileage, the engine and drivetrain components should have experienced gradual wear, but the presence of the engine MIL failure in 2025-09-03 raises concerns about potential underlying issues such as fuel system contamination, sensor failure, or electrical wiring problems that could persist despite the MOT passing. The suspension and tyre advisories from previous tests—particularly the nearside front tyre wear close to legal limits—highlight the importance of monitoring tyre condition, as uneven wear patterns can indicate misalignment, incorrect tyre pressure, or suspension component wear. For a prospective buyer, the most critical immediate actions should focus on the engine and electrical systems, given the history of the malfunction indicator light. Before purchase, conduct a thorough inspection of the engine bay for signs of oil leaks, coolant leaks, or unusual fluid discolouration, and verify that the engine management system is functioning correctly by testing for consistent fuel pressure and ignition timing. During a test drive, listen for any irregularities such as rough idling, hesitation, or misfires, and monitor for excessive smoke from the exhaust, which could indicate fuel or oil consumption issues. The track rod end ball joint advisory from 2025-09-03 suggests the offside front suspension may require closer inspection for excessive play or wear, particularly if the vehicle exhibits clunking noises from the front axle during cornering or rough road travel. Additionally, check the suspension for uneven tyre wear, binding calipers, or corrosion on brake discs, as these can indicate standing corrosion or poor maintenance. Beyond the mechanical checks, the vehicle’s age and mileage warrant attention to several age-related issues. Given the nine-year age and moderate mileage, inspect the tyres for signs of sidewall cracking or perishing, which can weaken the tyre structure and compromise safety, especially if the vehicle has been stored for prolonged periods. Verify the condition of the 12V battery, as standing vehicles can suffer from corrosion on terminals, reduced capacity, or internal failure, leading to poor starting performance or electrical system failures. Check the fluid levels and condition of the engine oil, coolant, brake fluid, and transmission fluid, as these fluids degrade over time and should be replaced according to manufacturer recommendations, typically every 60,000 to 100,000 miles or every two to three years, depending on the fluid type. Finally, ensure the service book is up to date, as the absence of recorded service stamps may indicate missed maintenance intervals, which could leave critical components such as the suspension, exhaust system, or electrical wiring vulnerable to failure. If the vehicle has been driven at a lower annual mileage, consider a more thorough inspection of the exhaust emissions system, as prolonged idling or standing can lead to carbon buildup or catalytic converter degradation.