2019 ->
Ready to order this tuning file? Access the ByteFlash Portal to place your order.
Order This File Ask a QuestionThe Mercedes GLS 350d 286hp (2019 ->) produces 286bhp and 600Nm in standard form. Our Stage 1 ECU tuning file raises output to 380bhp and 820Nm, a gain of 94bhp and 220Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.