RENNtech ECU+ Upgrade | W213 | E400 | 392 HP/463 LB-FT | 3.0L V6 BiTurbo | M276 | MY2017-2018 mercedes-benz-s-class--222---2018-2020--s450-biturbo-esr1451600 7L V8 BiTurbo) Stock Performance

7L V8 BiTurbo) Stock Performance (at crank):

the factory settings do NOT allow the valves to fully open unless certain speed and/or RPM have been reached

Matte finish is available by special request and requires additional lead time

355 HP @ 6

Professional installation is recommended

RENNtech ECU+ Upgrade | W213 | E400 | 392 HP/463 LB-FT | 3.0L V6 BiTurbo | M276 | MY2017-2018 mercedes-benz-s-class--222---2018-2020--s450-biturbo-esr1451600 7L V8 BiTurbo) Stock PerformanceECU+ Upgrade Up to 392 HP 463 LB FT Gains: +53 HP & +78 LB 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