decreasing the 0-60 times and the handling limits. Compared to the "55" supercharged 5.4 L V8 engine—which was restricted to the Speedshift 5G-Tronic five-speed automatic transmission, as it had a torque capacity of —the reduced torque of the "63" M156 6.2L V8 means it can be mated with the more efficient 7G-Tronic, which can withstand a limit of . Despite the reduction in torque, the increased horsepower and more efficient transmission enable the 63 models to match or surpass the acceleration of the "55" models. Most of the M156-engined models used the 7G-Tronic automatic transmission, however the more recent 2009 SL 63, 2010 E 63, and 2012 C 63 use the 7-speed MCT transmission. Previous M156 Models 2007–2010 S 63 AMG 2006–2010 CL 63 AMG 2007–2011 ML 63 AMG 2007 R 63 AMG 2006–2009 CLK 63 AMG (introduced at the 2006 Geneva Motor Show) (used as Safety Car for the 2006 and 2007 F1 World Championship) 2007–2011 CLS 63 AMG (introduced at the 2006 Geneva Motor Show) 2007–2009 E 63 AMG (Sedan and Wagon) 2009–2012 SL 63 AMG 2010–2012 E 63 AMG (Sedan and Wagon) Black Series SLK 55 AMG Black Series CLK 63 AMG Black Series SL 65 AMG Black Series C 63 AMG Black Series SLS AMG Black Series AMG GT Black Series The AMG Performance Studio in Affalterbach is responsible for the upgrades that make an AMG into an AMG Black Series model. The Black Series treatment is only available on 2 door vehicles, which includes weight reduction, bucket seats, exterior alterations, interior alterations, higher power, greater traction, handling, and significantly greater overall performance. Black Series models are known as street-legal race cars. The SLS AMG Black Series was tested by Motor Trend to have a 0-60 time of 3.2 seconds, and a quarter mile time of 11.1 seconds at 129.8 mph. The SLS AMG Black Series "demolished" the Motor Trend figure eight in just 23.1 seconds, beating the McLaren MP4-12C, Ferrari 458 Italia, Audi R8 V10 Plus, and the SRT Viper. The SLS AMG Black Series is currently the 22nd fastest car to lap the Nürburgring. The SLS AMG Black Series had the same 1:19 time as the Lamborghini Murciélago LP670-4 SuperVeloce, the Ferrari Enzo, and beat the Ferrari 458 Italia, Lamborghini Gallardo LP 560-4, Porsche 997 GT2, and Nissan GT-R around the Top Gear test track. Electric Drive In 2013, Mercedes-AMG announced the SLS AMG