Adjustable level of each volume
Subaru Impreza / Subaru Impreza Owners Manual / Audio / Hands-free system (if equipped) / Using the Hands-free system / Adjustable level of each volume

See also:
Brake booster
The brake booster uses engine manifold
vacuum to assist braking force. Do not
turn off the engine while driving because
that will turn off the brake booster, resulting
in poor braking power.
...
Non-turbo models
...
Setting the alarm-level engine speed
1. Push the trip knob to select “REV” on the combination meter.
2. When the trip knob is pushed for more than 2 seconds, the thousands place flashes.
3. Release your finger from the trip knob once ...
