2006 Mercedes C 1.8L Petrol · OU06 WDY

The most recent MOT, carried out on 10 October 2025, was passed but carried an advisory noting corrosion on both rear coil springs (5.3.1 (b)(i)). Over the last six years the vehicle has shown a generally positive trend: three consecutive passes with no recorded defects (2023‑2025) following a period of failures in 2020 and early 2021 that were addressed. The pattern suggests that the owner has been maintaining the car to a satisfactory level, with the only lingering concern being the developing corrosion on the rear suspension. At 69,040 miles recorded for a 2006 model the average annual mileage works out at roughly 3,450 miles per year, which is well below the typical UK usage of 7‑10 000 miles annually. Such low utilisation often points to light duty or extended periods of storage rather than high wear. While the low mileage reduces the likelihood of cumulative component fatigue, prolonged standing can accelerate corrosion of metal parts, especially the suspension, exhaust and under‑body, and can allow rubber components such as bushings and seals to dry out. The recurring advisory on the rear coil springs warrants a close visual and tactile inspection. Look for any signs of rust flaking, cracks or loss of spring integrity, and check that the rear anti‑roll bar and its bushings are sound. On a test drive listen for clunking or knocking when passing over bumps, and observe whether the rear ride height is consistent on both sides; uneven height may indicate a failing spring or collapsed damper. Verify that the front windscreen washer system now functions correctly, that the rear stop lamp illuminates fully, and that the headlamp aim is correctly set, as these were previously recorded as major failures. Any lingering issues in these systems would be a safety concern and could lead to a future MOT failure. Given the vehicle’s age, a thorough age‑related inspection is essential. Examine the tyre sidewalls for cracking, dry rot or age‑related perishing, and confirm that tread depth meets the legal minimum; the DOT code should show the tyres are not older than six years. Test the 12 V battery voltage and consider a load test, as batteries lose capacity when left idle for long periods. Inspect the brake discs for surface rust, scoring or uneven wear and check that the calipers move freely without binding; a pulsating pedal or shudder at higher speeds would indicate disc or pad issues. Finally, confirm that all major fluids—engine oil, brake fluid, coolant and power‑steering fluid— have been changed in accordance with calendar intervals, and that the service book contains appropriate stamps. A careful review of the chassis for rust, particularly around the rear suspension mounting points, will help you gauge whether the corrosion noted on the coil springs is an isolated issue or part of a broader structural concern.