Mercedes-Benz have unveiled its 2015 AMG S65, a car intended as a more powerful version of the S63 AMG 4Matic. Featuring a 6.0-liter twin-turbo V12 engine and a a seven-speed automatic transmission, the car boasts 621 horsepower and an even more impressive 738 lb-ft of torque, acceleration from 0 to 60 mph in 4.2 seconds and an electronically-limited top speed of 155 mph, who knows how fast the car could go without this? In addition the top of the range S-Class includes a AMG-tuned suspension – complete with Magic Body Control and Road Surface Scan – adaptive steering, a lightweight lithium-ion battery, 20″ forged alloy wheels and optional ceramic brakes while a diamond-quilted nappa leather is applied to the interior with a great IWC Schaffhausen clock embedded in the dash. The 2015 Mercedes-Benz AMG S65 will make an appearance at the upcoming Tokyo Motor Show while it will be available to purchase early next year.