The Mercedes SL 65 AMG Turbo 612hp (R230 - 2001 - 2011) produces 612bhp and 1000Nm in standard form. Our Stage 1 ECU tuning file raises output to 670bhp and 1100Nm, a gain of 58bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.