The reserves are fed through the latest incarnation of AMG’s seven-speed Speedshift MCT dual-clutch automatic gearbox, which operates in combination with a mechanical locking differential in the C 63 Coupe, but in the C63 S Coupé it comes allied to an even faster reacting electronic locking differential.
The driver can choose between four different driving modes on the C 63 Coupé and up to five on the S model, while the switchable electronic stability control system offers three settings: On, Sport and Off.
The styling of the latest C 63 Coupé is significantly differentiated from standard versions of the new . The only exterior elements shared between the two cars are the frameless doors, roof and boot lid. The remainder is unique.
The wider body has been developed to house a largely bespoke chassis featuring tracks that are increased in width by 73mm at the front and 46mm at the rear over the standard C-Class Coupé at 1636mm and 1592mm respectively. Wheels sizes vary according to model, with the new C 63 receiving 18in rims and the C 63 S running on 19ins.
Overall, the new car is 45mm longer, 107mm wider and 12mm higher than before. Crucially, it also rides on a wheelbase extended by 75mm over that of its predecessor, endowing it with added exterior space if not a larger boot, which at 355 litres in capacity is 95 litres less than before.
As for the standard equipment - the C 43 includes a wealth of standard equipment as found on the lower spec models of the coupé and cabriolet, including sat nav, reversing camera, leather upholstery etc. There is also the addition of an aggresive bodykit, 18in AMG-badged alloys and a performance exhaust system.
Upgrade to the C 63 and you'll find Mercedes COMAND infotainment system, LED headlights, sports seats, an more aggressive bodykit, a mechanical rear axle differential lock , and electrically adjustable front seats. While the C 63 S not only gains more power but 19in alloy wheels, red brake calipers and interior ambient lighting as well.
The C 63 Edition 1 car is inspired by Mercedes-AMG DTM race car, which means that it rolls on 19s at the front and 20s at the rear, a redesigned front splitter and aerodynamic bodykit, a Burmester sound system and numerous black gloss exterior trim.
The C 63 S Coupé is a different proposition to its predecessor but no less exhilarating on the right road. The big bore brawn of its old naturally aspirated engine has been confined to history, replaced by the more frenetic fervour of its new turbocharged powerplant.
Despite giving away more than 2.0 litres in capacity to the car it replaces and bringing an extra 70kg in kerb weight due to the increase in overall dimensions, it is still ferociously fast. Mercedes’ figures suggest the new C 63 S Coupé will accelerate from 0-62mph in just 3.9sec, making it faster than any of its rivals by some margin. With the optional AMG driver’s package, it’ll also run to a limited 180mph.
With a big lift in torque, the new engine brings added flexibility and performance. Its stout 516lb ft endows it with both greater speed out of the blocks on a loaded throttle and a more relaxed demeanour when cruising on lighter loads.
The delivery is extraordinarily linear for a forced-induction engine, giving it genuine character. Work it hard and it will spin to 7000rpm before the onset of the limiter. AMG has also exceeded in providing the C 63 S Coupé with a wonderfully hardcore exhaust note.