Subaru Outback
Subaru Outback

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.
...
Selecting audible signal operation
Using an electronic chirp, the system will
give you an audible signal when the doors
lock and unlock. If desired, you may turn
the audible signal off.
Do the following to deactivate the audible ...
Speedometer
The speedometer shows the vehicle speed. ...
