Subaru 2009 Impreza Navigation System - Manual (Page 105)

Audio and Visual 105
Basic operation of the Audio and Visual
Volume control buttons
Press the “+” button to increase the volume. Press the “-” button to
reduce the volume.
A number indicating the volume will be shown on the audio display.
MUTE button
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” goes off.
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