The latest generation normally aspirated, direct injected, 3.5 liter M276 V6 engine, with a maximum of 306 HP and 370Nm (272 lb-ft) of torque, is a powerful and smooth mid range engine. This engine is available in the 2012+ C, CLS, E, and ML. Our R&D department has spent an enormous amount of time perfecting the ECU software for this engine. An increase in power of up to 330 HP and 400 Nm (296 lb-ft), as well as improved throttle response and raised speed limiter, is now available. As a unique KLEEMANN feature, we have managed to improve the software in the 300 models (which is, in fact, the same engine as the 350, but intentionally limited in power production by the factory) so the new power level becomes the same level as the 350, plus tuning gains. 300 owners will gain what is a normally unheard of improvement in power and torque from an ECU tuning. 350-K1(BE): ECU tuning. Up to 330 HP and 400 Nm (296 lb-ft) of torque. 300-K1(BE): ECU tuning. Up to 330 HP and 400 Nm (296 lb-ft) of torque.