Hmm, I don't use voice to for navigation instructions personally. But I presume you mean using CarPlay navigation with Apple Maps?
Yes, exactly. I haven't tried other nav apps via CarPlay yet, but the nav voice for Apple Maps will come through the display's speaker if you are not using bluetooth connection between the display and the car for audio.
I haven't mastered the use of this yet. Not sure if I'm doing it wrong or if it's inconsistent. Which app are you using where this works well - Podcasts, Music, etc.?
Yeah, it didn't seem well documented and it is a little inconsistent. I think CarPlay thinks the scroll wheel is a dial with clockwise/counter clockwise movement not a wheel with up/down movement, so sometimes it'll move the cursor oddly.
It appears to have two modes. In the first mode, moving the right scroll wheel up or down will switch between the speedometer and the carplay displays. With carplay shown, pressing right on the scroll wheel will switch to controlling carplay.
When controlling carplay, the wheel up/down will move the cursor. Pressing right on the wheel will select the highlighted button. Pressing left on the scroll wheel will go back or home (if there is no back). Holding left on the scroll wheel will switch back to the speedometer display.