For “Command Help” menu items, all voice commands that are available for that system are listed.

Select Read to hear the commands in the list read aloud.
Voice Commands
Canceling Your Route
1 Press the DEST button.
2 Select Cancel Route.
From the map screen:
1 Select MAP MENU.
2 Select Cancel Route.
...
Map Update
INFO button
►Map Update
Update the map database.
When you order a map update, it is mailed to
you on a USB flash drive. ...
Brake System
Parking Brake
Use the parking brake to keep the vehicle stationary when parking.
To apply:
Pull the lever fully up without pressing the
release button.
To release:
1. Pull the lever slightly ...