RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2018 mercedes-benz-clk-class--208---1997-2003--clk-320-esr5032578 205 - C-Class Sedan and

205 - C-Class Sedan and Coupe

W222 - S63 AMG Sedan | MY2018+

working day in the garage or at your favorite Race Track - works great for hot beverages as well

Dyno measured by RENNtech (peak):              745 HP @ 6

565 HP @ 6250 RPM

RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2018 mercedes-benz-clk-class--208---1997-2003--clk-320-esr5032578 205 - C-Class Sedan andECU Upgrade 480HP 605LB FT Gains: +45HP 162Lb FT Our intermediate level ECU upgrade for the Mercedes M278 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas and countries with extreme altitudes, temperatures or