See also:

Tire chains
Tire chains cannot be used on your Impreza, WRX and STI because of the lack of clearance between the tires and vehicle body. ...

Acc
In this position the electrical accessories (radio, accessory power outlet, etc.) can be used. ...

Registering (pairing) device
1. Select the “PAIR AUDIO” (type C audio)/“Pair Audio Player” (type D audio) menu. If a device is already registered, “MEMORY FULL” is displayed and the mode changes to the Bluetooth® audio ...