Audio Source Selection

[johnv50]

I have a 2017 F3L and have a question about the source of audio to the speakers. When driving down the road what is the proper method of switching between the FM radio and the USB input ??. Is there a manual available for the audio system ??

thanks johnv

[Schlic]

Owner's Manual has the answer to your question. Pages 40-43 references the audio system. Page 41 for your specific question.