RENNtech ECU+ Upgrade | C218 | CLS 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014 mercedes-benz-gls-class--166---2017-2019--gls-63-amg-esr3017727 786 LB-FT @ 3

786 LB-FT @ 3

We typically see slightly higher baseline numbers than claimed by the factory

RENNtech Boost Pressure Gauge for the 117 - CLA Class

The maximum power number reached with the RENNtech ECU Plus Upgrade for the C292 - GLE 43 AMG Coupe is 416 HP and 460 LB-FT

RENNtech ECU+ Upgrade | C218 | CLS 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014 mercedes-benz-gls-class--166---2017-2019--gls-63-amg-esr3017727 786 LB-FT @ 3ECU+ Upgrade Up to 669HP 734LB FT Gains: +65HP & +88LB FT RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be