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 AMG G63 (W463)

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 AMG G63 (W463)ECU+ 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

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