The W204 C63 AMG weighs 1,730kg as a saloon and all models have a MacPherson strut-type three0-link front suspension with coilover damper and anti-roll bar. At the back is a multilink set-up similar to the standard versions of the C-Class, but for the AMG model the rear end was widened by 12mm. The front is some 35mm wider and AMG's engineers moved the entire front axle forwards to improve high speed stability. These changes also increased body rigidity of the steel monocoque. AMG Performance Suspension was an option to further tighten the dynamics.
18-inch wheels standard, many on 19s
Rack and pinion steering with speed sensitive hydraulic assistance is upgraded in the C63 from the standard C-Class to provide better feel and more weight. A steering wobble at speed is most likely due to the steering rack bolts needing to be tightened.
As standard, the C63 came with 235/40 R18 front and 255/35 R18 rear tyres. Original equipment tyres were Bridgestones, which owners report last well and offer good all-round grip for road driving. With gentle driving, a set of rear tyres will last up to 10,000 miles, but keener drivers can expect to get through rears in around 5,000 miles. Check the alloy wheels as they buckle easily over potholes and are also prone to kerb damage. The optional 19-inch alloys give a firmer ride.
The C63 has 360mm front discs and 330mm rears. Front brake pads should last around 25,000 miles and cost about £450 for original equipment ones from Mercedes. A full set of brake discs and pads all round from Mercedes will set you back £2,200, so finding a good independent makes a lot of sense to reduce running costs.
A big topic of discussion among C63 owners is the limited-slip differential. It was a standalone option when the car was new or you could also have it with the early Performance Pack. With the later Performance Pack Plus, the differential was deleted from the package but you could still choose it as a separate option.
PHer's view:
"The must have option is a limited-slip differential. If the car doesn't have one, there are plenty available on the aftermarket scene from the likes of Quaife."
Ed Harmer
Buying guide contents:
Introduction
Powertrain
Rolling chassis
Body
Interior