The Mercedes SL 350 V6 245hp (R230 - 2001 - 2011) produces 245bhp and 350Nm in standard form. Our Stage 1 ECU tuning file raises output to 258bhp and 373Nm, a gain of 13bhp and 23Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.