The direct injected and twin turbocharged 5.5 liter M157 V8 AMG engine is a technological masterpiece, producing 544 HP and 800 Nm (590 lb-ft) of torque. The 2012 CLS/E/ML/SL 63 AMG with 525 HP and 700 Nm (PP: 557 HP and 800 Nm) is a technological masterpiece with enough power to satisfy most drivers.While this may be enough enough power to satisfy most drivers, it may not satisfy ALL drivers.
Our insatiable hunger for more power has led us to investigate the software in the engine management system. Kleemann has found a massive amount of additional power and torque (regardless of chassis and Performance Pack) waiting to be unleashed. A Kleemann ECU tune will give you up to 680 HP and 950 Nm (700 lb-ft) of torque to utilize as you see fit.