The Mercedes GLK 200 CGi 184hp (X204 - 2010 ->) produces 184bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 250bhp and 400Nm, a gain of 66bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.