RENNtech ECU Upgrade | C218 | CLS 63 S AMG 4MATIC | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2015-2018 mercedes-benz-cls-class--219---2006-2011--cls-500-esr9637543 representing the embodiment of performance

representing the embodiment of performance and luxury

more powerful turbocharger capable increasing the power of the AMG 53 series

utilizing the existing integrated catalytic convertors

C257 - CLS Coupe CLS450 (Air Body Control Optional)

RENNtech ECU Upgrade | C218 | CLS 63 S AMG 4MATIC | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2015-2018 mercedes-benz-cls-class--219---2006-2011--cls-500-esr9637543 representing the embodiment of performanceECU Upgrade Up to 638HP 695LB FT Gains: +33HP & +49LB FT RENNtech M157 Biturbo ECU+ Upgrades are TV approved! Our intermediate level ECU+ upgrade for the Mercedes M157 Biturbo 4 MATIC engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components