Mercedes-Benz has announced full details on the 2012 CLS 63 AMG model.
New for the CLS 63 is now AMG's 5.5 liter biturbo V8 engine, which replaces the outgoing naturally aspirated 6.3 liter V8.
The new 5.5 liter biturbo unit features a peak output of 410 kW (557 PS/550 bhp) and 800 Nm (590 lb-ft) of torque with the AMG Performance package. The standard engine configuration is rated at 386 kW (525 PS / 521 bhp) and 700 Nm (516 lb-ft) of torque.
Both units are mated to the AMG Speedshift MCT 7-speed sport transmission.
Fuel economy on the standard CLS 63 AMG now comes in at under 10 liter/100 km (a noteworthy achievement) - with a 9.9 liters per 100 km rating on the European cycle (NEDC).