2018 MERCEDES-BENZ C4.0L PETROL

The Mercedes-Benz C-Class in question presents a stable roadworthiness record over the past 18 months, with only one minor failure noted in February 2024—a windscreen washer malfunction—subsequently resolved before the next test. The most recent MOT, conducted on 20 October 2025 at 46,093 miles, passed without defects, indicating no recurring mechanical or structural issues. The absence of advisories or defects in the three most recent passes suggests the vehicle has been maintained to a high standard, at least in terms of compliance with basic roadworthiness criteria. However, the single failure on the washer system—though trivial—does imply either a lack of attention to minor consumables or a known electrical quirk in this model. The mileage accumulation of roughly 5,762 miles per year is unusually low for an eight-year-old vehicle, particularly one of this class, which typically covers 10,000–12,000 miles annually. The gap between the 2023 test (33,353 miles) and the 2024 failure (35,474 miles) spans six months with minimal mileage gain, suggesting either infrequent use or prolonged storage. The subsequent tests in early 2024 and 2025 show similarly modest increases, reinforcing the pattern. While low mileage reduces wear on major components, it also raises questions about whether the vehicle has been driven regularly enough to identify latent issues—such as fluid leaks, suspension degradation, or electrical faults—before they become critical. Given the clean MOT history, a buyer should prioritise a thorough inspection of components not routinely checked during MOTs. Pay particular attention to the suspension—specifically the condition of coil springs, anti-roll bars, and bushings—since low-mileage vehicles can still develop stiffness or corrosion if exposed to moisture. The brakes should be tested for uneven wear or binding, especially if the car has been stood for long periods, as moisture ingress can accelerate corrosion in calipers or discs. Check for fluid leaks under the vehicle, particularly around the engine bay and transmission, as stagnant fluids can degrade seals over time. Finally, verify the operation of all electrical systems, including power windows, mirrors, and interior lights, as the single washer failure hints at potential broader electrical or sensor neglect. The absence of defects does not preclude the need for a pre-purchase inspection by a qualified Mercedes-Benz technician, particularly given the vehicle’s age and the unusual mileage pattern. Focus on proactive checks rather than relying solely on the MOT record, as some issues—such as early-stage exhaust emissions drift or subtle drivetrain wear—may not yet be MOT-critical but could escalate into costly repairs.