The Mercedes GLK 220 CDI 163hp (X204 - 2010 ->) produces 163bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 230bhp and 560Nm, a gain of 67bhp and 160Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.