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

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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.
...
Power door locking switches
1) Lock
2) Unlock
All doors and the rear gate (Outback) can be locked and unlocked by the power
door locking switches located at the driver’s side and the front passenger’s side
doors. To lock ...
Lubrication oil circulation in the refrigerant circuit
Operate the air conditioner compressor at a low engine speed (at idle or low
driving speeds) a few minutes each month during the off-season to circulate its
oil. ...
