2020 Mercedes-Benz C 1.9L Diesel · LS20 UCL

The most recent MOT, carried out on 25 July 2025, was a pass but was accompanied by several advisories covering the off‑side front lower suspension arm ball‑joint, the rear prop‑shaft flexible coupling and thin rear brake pads. The test history shows a pattern of intermittent failures – a major brake‑vacuum fault in July 2025 and a serious tyre bulge plus an engine MIL fault in June 2024 – followed by passes that still retain multiple wear advisories. This suggests that while the vehicle has been brought back to a road‑legal state after each failure, the underlying wear items are persisting and the overall maintenance trajectory is stabilising only after repeated remedial work rather than improving. At 87,808 miles the car has covered roughly 14,600 miles per annum since its first registration in 2020, a mileage rate that is high for a Mercedes‑Benz C‑Class. Such utilisation accelerates wear on consumables such as tyres, brake discs and pads, suspension bushings and drivetrain components. The recorded mileage also indicates that the vehicle is unlikely to have spent long periods standing idle, meaning that age‑related perishing of rubber components and corrosion of metal parts are less likely to be the dominant issue, but the cumulative stress on the suspension and braking system is significant. A prospective buyer should give particular attention to the front lower ball‑joint on the off‑side, probing for any lateral play or clunking when the wheel is rocked at the 12 and 6 o’clock positions. The rear prop‑shaft flexible coupling should be examined for any oil leakage, excessive vibration or loosened bolts, as deterioration can lead to driveline vibrations at higher speeds. The brake system warrants a thorough check: verify that the vacuum booster and master cylinder build pressure promptly, listen for a slow or uneven pedal return, and inspect the rear brake discs for scoring or corrosion that may accompany the thin pads noted in the advisory. A diagnostic scan for any stored engine fault codes is advisable to confirm that the MIL issue flagged in 2024 has been fully resolved. Tyre condition remains a concern; the vehicle has a history of sidewall cracking, inner‑edge wear and a previously dangerous bulge on the near‑side front. Examine all four tyres for any signs of perishing, bulges, or uneven tread wear that could indicate mis‑alignment or suspension wear. Check the tyre age by reading the DOT code – tyres older than six years should be replaced regardless of tread depth. In addition, assess the condition of the battery, looking for corrosion on terminals and testing voltage under load, as high mileage and age can diminish charge capacity. Finally, confirm that the service history includes timely oil, coolant and brake‑fluid changes, and inspect for any signs of fluid leaks around the engine bay, suspension mounts and rear sub‑frame, which are common in vehicles with this level of mileage and usage.