See also:

Key-In-Ignition Reminder
If you open the driver’s door and the key is in the ignition, a chime will sound to remind you to remove the key. NOTE: The Key-In-Ignition reminder only sounds when the ignition key is place ...

Chassis
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Conference Call
When two calls are in progress (one active and one on hold), press and hold the button until you hear a double beep indicating that the two calls have been joined into one conference call. ...