RENNtech ECU+ Upgrade | C238 | E450 BiTurbo | 392 HP/463 LB-FT | 3.0L V6 BiTurbo | M276 | MY2019-2020 mercedes-benz-s-class-coupe--217---2018-present--s-550-esr7343212 Please note that the Mercedes

Please note that the Mercedes M177 engine performance when measured

529 whp @ 6

778 LB-FT @ 4

0" Weight:   Construction: 1-piece Forged Tire Size: 265/35-21

R1 Performance Package for the C205 - C 63 AMG includes:

RENNtech ECU+ Upgrade | C238 | E450 BiTurbo | 392 HP/463 LB-FT | 3.0L V6 BiTurbo | M276 | MY2019-2020 mercedes-benz-s-class-coupe--217---2018-present--s-550-esr7343212 Please note that the MercedesECU+ Upgrade Up to 392 HP 463 LB FT Gains: +53 HP & +78 LB FT RENNtech M276 Biturbo ECU Upgrades are TV approved! 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.