See also:

New Level of Comfort and Convenience in All Models
Standard comfort and available amenities are increased across the Subaru Legacy line for 2010. The base 2.5i model, for example, features standard steering wheel audio and cruise control buttons, ...

Stereo indicator
The stereo indicator “ST” (type A, B and C audio)/“STEREO” (type D audio) will illuminate when an FM stereo broadcast is received. ...

ON
This is the normal operating position after the engine is started. ...