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:
Door open warning light
When the ignition switch is in the “ON” position, the door open warning light
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Going & Stopping
Subaru increased the Tribeca's standard horizontally opposed six-cylinder
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