2006 Mercedes-Benz C 2.1L Diesel · SO06 OCA

The 2.1 L diesel engine generally delivers around 45‑55 mpg in mixed driving, translating to roughly £1,200‑£1,400 per year on fuel at current diesel prices for an average UK driver. Road tax for a 2006 diesel of this size is typically £150‑£200 annually, depending on the exact CO₂ emissions. Insurance for a mid‑range executive car sits in group 20‑25, with typical premiums of £600‑£800 per year for a driver with a clean record.

Maintenance on a Mercedes‑Benz of this age can be higher than mainstream brands, especially for brake disc replacement, suspension components and DPF servicing. Expect annual maintenance and occasional repair costs in the region of £300‑£500, bringing the total estimated running cost to around £800‑£1,000 per year.

Focus on the braking system: the MOT failures list worn front and rear brake discs and an imbalanced rear axle. Inspect disc thickness, check for uneven wear and confirm that the brake fluid warning lamp is off. Also verify the condition of brake hoses and the corroded front brake pipe noted in the 2022 failure.

Check all exterior lighting, particularly the off‑side headlamp and the position lamp that failed in 2022, as well as the horn functionality flagged in 2024. Ensure the headlamp aim is correct and that the horn produces a clear sound. Examine the tyre condition, especially the near‑side front tyre that was close to the legal limit in 2022, and look for uneven wear that could indicate alignment issues.

Finally, conduct a general inspection of the suspension components, as suspension arm failures are a top MOT failure for this model group. Look for any cracked or worn bushes, leaking shock absorbers, and ensure the vehicle tracks straight without pulling.