I had an older AppRadio2 unit could play the radio when using the phone navigation on screen, but the audio for NAV would not come through...it was EITHER phone audio OR radio only.  Can anyone confirm if that is still the case with the 4100 or if the phone audio will play over the radio like built in nav audio would on the nav units???

Thanks,

Matt.

Just confirmed this... audio played by the head unit (HD Radio, disc, SD card, USB drive) is interrupted by android auto prompts. Only issue is there is a much longer pause to resume than with Android Auto sourced audio.