The Mercedes SL 63 AMG 525hp (R230 - 2001 - 2011) produces 525bhp and 630Nm in standard form. Our Stage 1 ECU tuning file raises output to 540bhp and 660Nm, a gain of 15bhp and 30Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.