RENNtech ECU+ Upgrade | S212 | E 63 (S) AMG | Wagon | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2016 exhaust-valve-module Rated by RENNtech (peak @wheel):

Rated by RENNtech (peak @wheel):              325 whp @ 5

No drilling or modifications to the trunk are necessary

The maximum power number reached with the RENNtech ECU Upgrade for the E450 is 392 HP and 463 LB-FT

Rated by RENNtech (peak @wheel):              502 whp @ 4

RENNtech ECU+ Upgrade | S212 | E 63 (S) AMG | Wagon | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2016 exhaust-valve-module Rated by RENNtech (peak @wheel):ECU+ 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