2019 Mercedes-Benz GLA 1.6L Petrol · S23 HWL

The most recent DVSA MOT test on the 2019 Mercedes-Benz GLA, conducted on 2026-02-14, resulted in a passing grade, though it followed a failure in 2026-02-06 due to a critical issue with the near-side front constant velocity (CV) drive shaft joint boot being split or insecure, allowing ingress of contaminants that compromise lubrication and joint integrity. This marks a notable deterioration in roadworthiness from the prior test, as the vehicle previously passed without any defects in the preceding two years. The advisories regarding front tyre wear close to the legal limit—both near-side and off-side—suggest a pattern of excessive tread loss, which could indicate either aggressive driving habits or underlying suspension or alignment issues that accelerate tyre degradation. While the 2025 and 2024 MOTs were clean, the sudden failure highlights a maintenance gap or a developing mechanical problem that warrants immediate attention. The recorded mileage of 47,315 miles for a seven-year-old GLA represents a moderate annual usage rate of approximately 6,759 miles per year, which is within the expected range for this vehicle class. However, the rapid accumulation of miles between the 2023 and 2026 MOTs—particularly the failure occurring just over two years after a clean test—suggests either increased operational demands or potential neglect in routine maintenance. Higher mileage generally accelerates wear on consumables such as brake pads, tyres, and suspension components, as well as lubricants like the CV joint boot fluid, which is critical for preventing contamination. The CV joint failure specifically points to either inadequate servicing of the boot or prolonged exposure to harsh conditions, both of which can lead to premature joint failure and subsequent drivetrain damage if unresolved. For the prospective buyer, the most pressing concern is the near-side front CV joint boot failure, which requires immediate replacement to prevent further contamination of the CV joint and potential transmission of contaminants into the differential. Inspect the CV boot for signs of oil leakage around the boot seal, unusual noises from the front wheels during acceleration or cornering, or a noticeable vibration or clunking when the vehicle is driven at higher speeds. The advisories on front tyre wear close to the legal limit necessitate a thorough inspection of the vehicle’s alignment and suspension geometry, as uneven tyre wear can indicate camber, toe, or caster issues. Additionally, check for excessive play in the suspension components, particularly the front strut mounts and control arms, which may contribute to the tyre wear pattern. Beyond the immediate issues, the rear tyre advisory of slight cracking or perishing—though not critical—should be monitored, especially if the vehicle has been stationary for prolonged periods, as this can accelerate sidewall deterioration. Given the vehicle’s age and mileage, a comprehensive inspection of the brake system is advisable, including checking for corrosion on brake discs, particularly on the near-side front where the CV joint failure may have exposed components to moisture. Inspect the brake fluid level and condition, as standing brake fluid can degrade over time, leading to reduced braking performance. Finally, verify that the service history includes scheduled fluid changes, such as the CV joint boot lubricant and differential fluid, and that the vehicle has been serviced according to the manufacturer’s recommendations. A thorough test drive should also include checking for exhaust emissions compliance, as older vehicles may exhibit reduced catalytic converter efficiency or fuel system inefficiencies, particularly if the engine has not been serviced recently.