See also:

Low tire pressure warning light (U.S.-spec. models)
When the ignition switch is turned to the “ON” position, the low tire pressure warning light will illuminate for approximately 2 seconds to check that the tire pressure monitoring system (TPMS) ...

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. ...

Shift lock function
The shift lock function helps prevent the improper operation of the select lever. • The select lever cannot be operated unless the ignition switch is turned to the “ON” position and the brake pedal i ...