2016 Mercedes-Benz GLA 2.1L Diesel · PO66 XMX

The most recent MOT test on 27 December 2025 resulted in a pass, but it is critical to note that the vehicle failed earlier that same day due to an inoperative or malfunctioning Engine Malfunction Indicator Lamp. This suggests a recent electronic or sensor-related fault within the engine management system that required rectification. The overall maintenance trend appears somewhat reactive rather than proactive, as evidenced by the dangerous brake pad failure recorded in 2023 and the recurring advisories regarding tyre degradation, suggesting that consumables are often addressed only when they approach a failure threshold. The recorded mileage of 33,411 miles is exceptionally low for a 2016 vehicle, representing an annual average of approximately 3,341 miles. While this low usage implies reduced mechanical wear on the engine, gearbox, and suspension components, it introduces specific risks associated with infrequent use. Long periods of standing can lead to the perishing of rubber components, the chemical degradation of fluids, and the buildup of corrosion on braking surfaces, which can be just as impactful on long-term roadworthiness as high-mileage wear. A significant area of concern is the condition of the tyres, as the most recent MOT specifically advises that both front and rear tyres are showing signs of cracking or perishing. This is a direct consequence of the vehicle's age and low usage. During your inspection, you should examine the tyre sidewalls closely for any signs of age-related cracking and check for uneven tread wear. Additionally, given the previous failure regarding the nearside front brake pads, you should inspect the entire braking system for adequate thickness and check the brake discs for heavy corrosion or pitting, which is common in vehicles that sit idle for long periods, and listen for any binding or squealing from the calipers. You must ensure that the engine management fault identified in the 2025 test has been professionally diagnosed and resolved with a confirmed clear fault code, rather than just a bulb check. Because of the low mileage, it is vital to verify that the service history reflects calendar-based maintenance; fluids such as brake fluid, coolant, and engine oil must be changed based on time intervals to prevent internal degradation. Finally, check the 12V battery for health, as low-usage vehicles often suffer from battery sulphation, and listen for any suspension clunks or knocks that might indicate perished bushes or worn coil springs due to age-related rubber degradation.