The new 2011 Mercedes Benz S63 AMG made its online debut a week after the presentation of the facelifted CL63 AMG luxury coupe. The two cars share the same AMG 5.5-litre V8 biturbo, which replaces the naturally aspirated 6.2-liter V8 unit.

In the 2011 S63 AMG, the hand-built 5.5-liter V8 which combines direct petrol injection with bi-turbocharging and a start/stop system, pushes out 544HP at 5,500 rpm and 800Nm of peak torque between 2,000 and 5,500rpm. Power is transferred to the rear wheels by the AMG SPEEDSHIFT MCT 7-speed automatic transmission. The high-performance German saloon accelerates from 0 to 100 km/h in 4.5 seconds with an electronically limited top speed of 250 km/h.

Despite an increase in output of 19HP and 170Nm over the outgoing naturally aspirated 6.2-liter V8, Mercedes says that with a combined fuel consumption of 10.5lt/100km, the new S63 AMG is more economical than the previous model. Likewise, CO2 emissions have been reduced by almost 30 percent at 244g/km.

The updated 2011 model year S63 AMG is distinguished on the outside by the "V8 Biturbo" lettering on the mudguards. It also get a new set of 19-inch alloy wheels fitted with 255/40 or 275/40 R19 tires. On the Inside, there's a revamped instrument cluster with an "AMG V8 Biturbo" starting screen, while the leather upholstery has been enhanced with new contrasting color stitching.

Lastly, the revised S63 AMG will be offered in both short and long wheelbase versions. The market launch is planned for end of September.