See also:

MUTE button (if equipped)
Press this button if you wish to immediately cut the volume to zero. The audio display will show “MUTE”. If you press the button again, the original sound volume will return and “MUTE” turns off. ...

To enter the passive mode
If you wish to program the passive arming mode, have it done by your SUBARU dealer. ...

Air conditioner button
The air conditioner operates only when the engine is running. Press the air conditioner button while the fan is in operation to turn on the air conditioner. The indicator light will illuminate. ...