2020 Mercedes-Benz Citan 109 Pure CDI 1.5L Diesel · N5 SOS

A commercially operated 2020 Mercedes-Benz Citan with 105,068 recorded miles presents a roadworthiness profile that demands careful attention, primarily because its MOT history reveals a single but significant failure event during a relatively short testing window of just four recorded tests. Most recently, the vehicle passed its test on 25 July 2026 with no defects recorded, suggesting a stable mechanical state at present. However, the failure dated 18 July 2025 is concerning due to its combination of severity: the offside rear brake pads were found to be less than 1.5 mm thick and categorised as dangerous, alongside a major engine management indicator lamp (MIL) showing a malfunction. That same test also recorded pitted and scored brake discs on both front and rear axles, which suggests the braking system has experienced uneven wear and thermal stress consistent with heavy commercial use rather than light passenger duties. The annual mileage accumulation of approximately 17,511 miles per year is notably high relative to the vehicle's age and places it firmly within commercial or fleet usage patterns. This level of mileage means consumable components such as brake pads, discs, tyres, and clutch assemblies will typically require replacement at shorter intervals than on a privately owned van. The pattern of brake-related advisories, including the dangerous brake pad failure and the scored discs, aligns logically with this high usage profile and indicates that the braking system should be regarded as a known wear item requiring proactive inspection rather than a long-term concern. The absence of testing gaps and the consistent year-on-year mileage progression suggest the vehicle has remained in regular service throughout its recorded history, with no extended periods off the road that might mask intermittent mechanical issues. For a prospective buyer, the immediate priority is a thorough physical inspection of the braking system, given the dangerous pad failure and disc scoring recorded in 2025. On a test drive, listen for any grinding or squealing from the rear brakes, particularly under light pedal application, and check for pulling to one side under braking which could indicate a binding or seizing caliper following the pad replacement. Inspect the offside rear brake pad thickness directly and measure both front and rear brake disc wear with a micrometer if possible, looking for ridging or lipping exceeding the manufacturer's minimum thickness specification. Additionally, confirm that the engine management warning light is not currently illuminated on the dashboard, as the inoperative MIL recorded in 2025 could indicate an underlying fault such as a faulty sensor, DPF issue, or emissions system concern that may have been rectified but warrants verification through diagnostic scanning. Beyond the braking system, the front brake disc wear advisory from 2025 and the previous front tyre edge wear advisory from 2023 point towards potential suspension geometry or wheel alignment concerns worth investigating. On a test drive, pay attention to any steering pull to the left or right, uneven tyre wear across the front axle, or knocking or clonking noises from the front suspension over uneven surfaces, which could indicate worn wishbone bushes, drop links, or top mount bearings under high mileage stress. Check the condition of all four tyres closely for uneven shoulder wear, and verify the central high-mounted stop lamp is securely fixed, as this was flagged as insecure on two consecutive tests in 2025. Given the high commercial mileage and the brake failure history, a pre-purchase inspection by a Mercedes-Benz commercial vehicle specialist or independent commercial van workshop is strongly advisable to assess the full mechanical condition beyond what MOT testing alone can reveal.