The Mercedes SL 65 AMG V12 BiTurbo 630hp (2016 - 2021) produces 630bhp and 1000Nm in standard form. Our Stage 1 ECU tuning file raises output to 740bhp and 1300Nm, a gain of 110bhp and 300Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.