Following on from the recent launch of the SL 63 AMG, there now comes the presentation of the new Mercedes-Benz SL 65 AMG, the V12 roadster in the line-up.

The AMG 6.0-litre V12 "biturbo" (twin-turbocharged) engine develops a maximum output of 630 hp and maximum torque of 1000 newton metres. As with the SLS AMG super sports car, the use of an all-aluminium bodyshell results in a reduction in weight. The new SL 65 AMG is some 170 kilograms lighter than before. The expressive front section is dominated by the new "twin blade" radiator grille and the front apron's lower cross strut in high-sheen chrome.

"The combination of exclusive V12 dynamic performance and a refined roadster driving experience was already the defining attribute of the predecessor model. We are convinced that, with the new SL 65 AMG, we have developed an incomparably exciting high-performance vehicle for the small, but loyal community of fans," says Ola Källenius, ceo of Mercedes-AMG GmbH.

An important aspect of the new model is the intelligent lightweight construction which also contributes to improved fuel efficiency. At 24.4 mpg (NEDC combined), the new car is 17 per cent more efficient than the previous SL 65 AMG. Despite the significantly reduced fuel consumption, the maximum output of the AMG V12 6-litre biturbo engine is up from 612 hp to 630 hp. The maximum torque is 1000 newton metres.

Acceleration from 0 to 62 mph takes 4 seconds with the 125 mph mark attained after just 11.8 seconds. The top speed is 155 mph (electronically limited).

The new Mercedes-Benz SL 65 AMG will arrive in the UK in Autumn, 2012.

UK pricing and specifications are still to be confirmed.