RENNtech ECU+ Upgrade | S213 | E63 AMG (S) 4MATIC+ | 773 HP/778LB-FT | 4.0L V8 BiTurbo | M177 | MY2018-2023 mercedes-benz-cls-class--219---2006-2011--cls-63-amg-esr3294546 Adjusted setting loaded onto car

Adjusted setting loaded onto car via Bluetooth

516 LB-FT @ 2

0L V8 BiTurbo | S and non-S)  Modified Performance (at crank):

The desired lowering setting will be loaded onto the vehicle via the ODB2 port in the footwell of the car

Rated by RENNtech:                375 HP @ 5

RENNtech ECU+ Upgrade | S213 | E63 AMG (S) 4MATIC+ | 773 HP/778LB-FT | 4.0L V8 BiTurbo | M177 | MY2018-2023 mercedes-benz-cls-class--219---2006-2011--cls-63-amg-esr3294546 Adjusted setting loaded onto carECU+ Upgrade Up to 773 HP 778 LB FT Gains: +82 HP & +84 LB FT RENNtech tuning products are certified to meet CARB standards in all 50 States. 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