Subject: Firmware Update Procedure for Viano Integrated Television Module
Applies to: Mercedes-Benz Viano (W639) factory RSE (Rear Seat Entertainment) & compatible aftermarket units
For factory Viano TV systems without a visible USB port: viano tv software update
If your TV won’t connect to Wi-Fi or the over-the-air update keeps failing, use a USB stick. Viano TV System Software Update – Technical Advisory