Is the Mercedes C63 AMG reliable?
In the main, the C63 is a pretty bulletproof super saloon and as long as it is well maintined with regular servicing and MOTs, you shouldn't run into any major issues. The V8 engine is highly strung and the early cars did suffer from a common issues which you can read about below.
Parts aren't cheap either but are readily available through both main dealers and independent specialists.
Engine: Carbon can build up on the intake valves of the M156 V8 over time, causing a rough idle or misfire. Before buying, make sure the car has been regularly serviced, and ask the seller whether the engine has ever had carbon cleaning or walnut blasting carried out.
Early models can suffer from rear cylinder head bolt failure, so owners often swap to heavy-duty aftermarket bolts. Watch out for misfires or any unexplained loss of coolant, too. Untoward engine noises could signal a knackered timing chain adjuster or, less likely, worn cam lifters.
Electrics: C63’s relative newness means electrical issues range from potential problems with the infotainment to broken sensors, and most problems will be a specialist repair job. So best check absolutely everything works as it should.
Gearbox: Check for rough shifting and jerky changes: it could be signs of trouble. Fluid and filters want changing every 40,000 miles, and the later MCT automatic has been known to overheat.
Suspension: Worn bushings, control arms and shock absorbers are par for the course. Watch out for any clunking noises or a harsh ride.
Brakes: It’s a fast, heavy car, so check the brakes regularly and treat them well. Performance Pack brakes are considerably more expensive to work with.
An owner’s view
James Roxburgh: “I’ve owned my C63 AMG Estate since 2011. Since then I’ve done more than 80,000 miles, and it has been hugely practical and great to drive. Last year I noticed some vibrations at around 2000rpm – so far I’ve had the clutch/torque converter replaced, costing £1500, but it hasn’t resolved things. It could be worn bushes or engine/gearbox mounts, but it’s being investigated. Fuel and tyres are also expensive.
"Despite the running costs, I absolutely love the car. The performance, sound and handling never fail to put a smile on my face and it still feels eye-wateringly fast. I wouldn’t change anything about it.”
Also worth knowing
With a 450bhp sports saloon that’s nose-heavy and prone to tail-out antics, you should thoroughly check the tyres. Stick to Continental or Michelin for replacements and expect to pay around £700-£800 for a full set. They wear quickly, too.
Not only will you have to fork out for pricey maintenance bills should your C63 go wrong, but you’ll also have to pay £735 just for the annual road tax – but it’s worth every penny just for that V8.
Even though the coupé version didn’t arrive until 2011, it’s the estate bodystyle that’s the rarest of the three. Thankfully the wagon’s exclusivity doesn’t make it any more expensive than the coupé or saloon.