To use the vanity mirror, lower the sunvisor.
If your vehicle is equipped with a vanity mirror light, it will illuminate when you open the cover.
To prevent the battery from being discharged, the vanity mirror will only illuminate in the tilt range shown below.

Side Extension Sunvisors
Interior LightsWarning lights and indicators
The Subaru Solterra is equipped with a comprehensive set of warning
lights and indicators located on the instrument cluster and exterior mirrors, designed
to clearly communicate the current condition and operational status of various vehicle
systems to the driver in real time.
Warning lights ...
Passenger Side Air Bag Module Removal/Installation [Standard Deployment Control
System]
WARNING:
Handling the air bag module improperly can accidentally deploy the air bag
module, which may seriously injure you. Read the air bag system service warnings
and cautions before handling the air bag module..
NOTE:
When replacing the passenger-side air bag module af ...
ABS HU/CM Removal/Installation
WARNING:
If the ABS HU/CM configuration is not completed, it could result in an unexpected
accident due to the ABS being inoperative. If the ABS HU/CM or ABS CM is replaced,
always use the automatic configuration function so that the ABS operation conditions
are correct.
CAUTI ...