RENNtech Intermediate ECU Upgrade | W221 | S 63 AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2011-13 mercedes-benz-e-class-sedan--213---2017-present--e-400-esr7342366 900rpm Note: Mercedes M278 engine

900rpm Note: Mercedes M278 engine performance when measured

RENNtech Power Module  | CLE 53 AMG | 3

the new setting is uploaded and the car will adjust to the new height

RENNtech Carbon Fiber Wing is available with tall or low style stanchions

Sider Rocker Panels

RENNtech Intermediate ECU Upgrade | W221 | S 63 AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2011-13 mercedes-benz-e-class-sedan--213---2017-present--e-400-esr7342366 900rpm Note: Mercedes M278 engineIntermediate ECU Upgrade Up to 638HP 695TQ Gains: +75HP +101TQ 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