See also:

Activation/deactivation
Press the button. ...

Automatic update
About twice a year, Sirius performs an update of the channel names and positions. The update takes place automatically and may take several minutes. ...

Collision warning
The concep The system issues a two-phase warning of a danger of collision at speeds above approx. 10 mph/15 km/h. The time of these warnings may vary depending on the current driving situation. ...