Mercedes-Benz SLK55 AMG Showcased at Frankfurt
The Mercedes-Benz SLK55 AMG coupe convertible for the Frankfurt Motor Show will be equipped with a new 5.5-liter V8 engine. The 5,461cc engine in the new Mercedes-Benz SLK55 AMG coupe convertible is a normally aspirated version of the twin-turbo 5.5-liter V8 which powers the new Mercedes-Benz CLS63 AMG and Mercedes-Benz E63 AMG models.
In order to pack the all aluminum 187kg V8 in the Mercedes-Benz SLK55 AMG coupe convertible, the removal of the two turbos was necessary. The new 5.5 V8 has received an extra 60hp over the old V8 in the outgoing Mercedes-Benz SLK55 AMG coupe convertible to 420 hp, while torque has risen from 509 Nm to 539 Nm (376lb-ft to 398lb-ft), according to our British contributor.
Also, the fuel economy and CO2 emissions have been improved by 30% in the new Mercedes-Benz SLK55 AMG coupe convertible over the old model. The engine features an innovative F1-inspired AMG Cylinder Management shut-off system, that allows the engine to run on just four cylinders under partial loads to help economy. The Mercedes-Benz SLK55 AMG coupe convertible will also feature a new sports exhaust system with two separate rear silencer flaps. These stay closed at low revs below 2000rpm, and progressively open as the driver applies more throttle for a louder exhaust note.
Alongside the Mercedes-Benz SLK55 AMG coupe convertible at Frankfurt will be a diesel version of the new SLK, the first time an oil-burner has features in the roadster. The Mercedes-Benz SLK250 CDI will be powered by a 201hp four-cylinder turbodiesel that is already used in many of the staple Mercedes models. Both the Mercedes-Benz SLK55 AMG coupe convertible and Mercedes-Benz SLK250 CDI are expected to enter showrooms by early 2012.