The Mercedes-Benz S 65 AMG was the top of the line variant for high performance of the W221 S-Class  introduced for the 2007 model year. This AMG version was powered by a 6.0 twin turbo V12 engine. Drive from the engine was sent to the rear wheels viaa 7 speed 'SPEEDSHIFT' automatic transmission. Production of the W221 Mercedes-Benz S65 AMG ended for the 2013 although the model series would continue in the next generation W222 Mercedes-Benz S-Class as the W222 S65 AMG