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 The maximum power number reached

The maximum power number reached with the RENNtech ECU Upgrade for the E400 is 392 HP and 463 LB-FT

Note: We have found the new M157 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz

representing the embodiment of performance and luxury

in order to improve your track setup/alignment

CLK CABRIOLET (A 209) 63 AMG [2 Filters Required] (HP: 481 | Year: 06 > 10)

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 The maximum power number reachedECU 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