spoke with tech support today about the lack of audio using the VGA navi cable and they acknowledged the issue and said they have been working on deploying a firmware update to fix it asap.
Map update is also very soon according to the second tier tech support person. I get video and mirror support to my 940BT but no audio. Using the CD-IV202NAVI recommended cable system.
Firmware update will be required for it to work is what they officially told me today.