The Mercedes GLA 200 CDI 4 Matic 136hp (X156 - 2014 - 2016) produces 136bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 200bhp and 420Nm, a gain of 64bhp and 120Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.