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. ...

Satellite radio operation (if equipped)
To receive satellite radio, it is necessary to install the SUBARU genuine satellite receiver for some models, and to enter into a contract with a satellite radio network service such as “XMTM sate ...

Ignition switch light
For easy access to the ignition switch in the dark, the ignition switch light illuminates when driver’s door is opened or when the driver’s door is unlocked using the remote keyless entry transmit ...