The Mercedes GLA 45 AMG 360hp (X156 - 2014 - 2016) produces 360bhp and 450Nm in standard form. Our Stage 1 ECU tuning file raises output to 400bhp and 520Nm, a gain of 40bhp and 70Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.