The Mercedes CLS 220 CDI 170hp (C218 - 2014 - 2018) produces 170bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 220bhp and 500Nm, a gain of 50bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.