Shift-up indicator light (STI)
Subaru Impreza / Subaru Impreza Owners Manual / Instruments and controls / Warning and indicator lights / Shift-up indicator light (STI)

While selecting the Intelligent (I) mode of SI-DRIVE, this indicator light illuminates and informs the driver about the upshift timing for fuel-efficient driving.
See also:
Interior lights
When leaving your vehicle, make sure the lights are turned off to avoid battery discharge. ...
Parking brake warning
The light illuminates with the parking brake applied while the
ignition switch is in the “ON” position. It turns off when the parking brake is
released. ...
Type A audio set (if equipped)
The audio set will operate only when the ignition switch is in the “Acc” or “ON”
position.
● Power and sound controls: refer to page 5-6
● Radio operation: refer to page 5-9
● ...
