2021 Mercedes-Benz Vito 1.9L Diesel · WN71 RKA

The most recent MOT test on the 2021 Mercedes-Benz Vito, conducted on 2025-10-13, resulted in a clean pass with no recorded defects, marking a significant improvement from the previous test on 2025-10-09, which failed due to two major faults: a near-side front coil spring fracture and an incorrectly adjusted parking brake mechanism. The advisory from the 2024-10-18 MOT—indicating near-side rear inner tyre wear—persisted into the following year, suggesting a pattern of wear that, while not immediately critical, warrants closer attention. The absence of further failures since the 2025-10-09 test indicates a positive maintenance trend, though the spring failure and parking brake issues underscore the need for thorough mechanical scrutiny to prevent recurrence or progression of wear in high-stress components. The recorded mileage of 146,856 miles for the vehicle, which is approximately 29,371 miles per year, is notably high for a five-year-old model, particularly when compared to typical usage patterns for commercial or family vehicles in the UK. Such mileage accumulation typically correlates with increased wear on consumables like brake pads, suspension bushes, and drivetrain elements, as well as accelerated degradation of fluids such as brake fluid, differential oil, and coolant. The absence of significant gaps between MOT tests suggests consistent operational use, which may have contributed to the observed wear, but it also implies that the vehicle has likely undergone regular servicing to mitigate long-term damage. The rapid mileage accumulation could also indicate exposure to rough road conditions, heavy loads, or prolonged periods of high-speed driving, all of which accelerate component fatigue. Given the history of coil spring failure and the persistent tyre wear advisories, the prospective buyer should conduct a meticulous inspection of the suspension system, focusing on the near-side front coil spring and rear suspension components. During a test drive, listen for unusual clunking or rattling noises from the front suspension, particularly when cornering or over bumps, which may indicate worn or damaged coil springs or broken suspension bushes. Inspect the brake system for signs of binding calipers, uneven brake disc wear, or corrosion, as the previous parking brake adjustment failure could lead to binding if not rectified. Additionally, check for fluid leaks around the coil spring mounts and undercarriage, as oil or coolant leaks from these areas can exacerbate wear. The advisories regarding tyre wear—particularly the near-side rear inner edge—should prompt a visual inspection of tyre tread depth and sidewall condition, as edge wear can signal misalignment, suspension issues, or improper tyre inflation. If the tyre wear is severe, consider replacing the tyres to prevent blowouts or hydroplaning hazards. For the buyer’s practical inspection, given the vehicle’s age and high mileage, the following checks are critical. First, verify the condition of the tyres, including sidewall perishing or cracking, which can weaken the tyre structure and lead to sudden failure. Check the 12V battery for signs of corrosion on terminals, poor connections, or reduced cranking power, as commercial vehicles often experience battery drain from accessories or electrical systems. Inspect the brake discs and pads for corrosion, binding, or excessive thickness loss, and test brake pedal travel and response for sponginess or excessive travel, which may indicate fluid degradation or hydraulic system issues. Fluid checks should include the brake fluid reservoir, differential oil, and coolant, as these fluids degrade over time and can lead to catastrophic failures if not replaced. Finally, verify that the service book has been updated for time-based maintenance, such as timing belt replacement (if applicable), spark plug changes, and oil drain intervals, to ensure the vehicle remains compliant with manufacturer recommendations. If the vehicle has been stored for extended periods, check for standing corrosion on the undercarriage, particularly around wheel arches, exhaust systems, and suspension components, as prolonged exposure to moisture can accelerate rust formation.