2019 ->
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Order This File Ask a QuestionThe Mercedes GLS 63 AMG V8 Bi-Turbo 612hp (2019 ->) produces 612bhp and 850Nm in standard form. Our Stage 1 ECU tuning file raises output to 690bhp and 950Nm, a gain of 78bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.