RENNtech Intermediate ECU Upgrade | W166 | GLE63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2016+ mercedes-benz-s-class--221---2007-2013--s63-amg-biturbo-esr6433928 450rpm Note: Mercedes M177 engine

450rpm Note: Mercedes M177 engine performance when measured on the dyno obtains higher power numbers than rated from factory

fiber is pre-impregnated (hence the name) with resin at a production facility

CLS 500 (C219) Stock Performance:

This design flows seamlessly into the front apron and is a simple

48 HP and 54 LB-FT Torque

RENNtech Intermediate ECU Upgrade | W166 | GLE63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2016+ mercedes-benz-s-class--221---2007-2013--s63-amg-biturbo-esr6433928 450rpm Note: Mercedes M177 engineIntermediate ECU Upgrade Up to 638HP 695LB FT Gains: +33HP & +69LB FT RENNtech M157 Biturbo ECU+ Upgrades are TV approved! Our proprietary 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. Our intermediate level ECU upgrade offers huge gains in performance across the entire RPM range without sacrificing around town