RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2014 mercedes-benz-sl-class--231---2017-present--sl63-amg-esr2518058 pulling the car to the

pulling the car to the ground for enhanced down force and stability at speed

RENNtech Classic Carbon Fiber Airbox designed for M119 V8 engines

AMG GT S MY2015-2017 Pre-FaceLift

AMG GT MY2018+ FaceLift

GLS 63 S AMG EQ Boost (MY2021+ | X167 | M177 | 4

RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2014 mercedes-benz-sl-class--231---2017-present--sl63-amg-esr2518058 pulling the car to theECU Upgrade 480HP 605LB FT Gains: +45HP +162TQ 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