RENNtech Intermediate ECU Upgrade | W166 | ML63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2013-15 mercedes-benz-e-class-wagon--213---2017-present--e-53-amg-esr5164676 No interference with any control

No interference with any control units

ECU+ Upgrade | Up to 601HP / 582LB-FT | Gains: +65HP & +87LB-FT

Up to 670HP and 840LB-FT

lowering the temperature of the brakes and lessening the possibility of brake fade

RENNtech Intermediate ECU Upgrade | W166 | ML63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2013-15 mercedes-benz-e-class-wagon--213---2017-present--e-53-amg-esr5164676 No interference with any controlIntermediate ECU Upgrade Up to 638HP 695LB FT Gains: +64HP & +72LB 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