Depress the button on the seat belt buckle.

Fastening the Seat Belt
Seat Belt ExtenderEmergency Driving Stop System
In the Subaru Solterra, the Emergency Driving Stop System is engineered
to automatically slow down and bring the vehicle to a controlled stop within its
lane if the driver becomes unable to continue driving, such as in the case of a
sudden medical emergency or loss of responsiveness.
While ...
Drive Belt Removal/Installation [Mzr 2.3 Disi Turbo]
1. Remove the aerodynamic under cover No.2 and splash shield as a single unit..
2. Rotate the drive belt auto tensioner in the direction shown in the figure
and remove the drive belt.
3. Install the drive belt.
4. Verify that the drive belt auto tensioner indicator mark does not exceed ...
Taking Action
Take the appropriate action and verify that the warning light turns off.
KEY Warning Light
Take the appropriate action and verify that the warning light turns off.
...