Does placing the phone in the dock automatically launch the car dock app?
I have the car dock. Audio output doesn't work...yet. Hopefully, it will after an update.
The car dock has a sliding piece with a male micro usb plug built into it. The phone goes to car dock mode when you slide the piece over to engage the male plug into your phone. The phone stays in the dock just fine without the sliding piece engaged. Furthermore, I have found that if I am in a map app (for example: google maps, my tracks, google navigation) the phone will stay in the app after engaging the male plug. Hope this answers your question.