See also:

Interior rearview mirror
Auto-dim function An integrated sensor reacts to headlights from following traffic and automatically reduces glare in the mirror. ...

Signals from the park assist system
View in the display (warning for objects front left/right rear) ...

ABS (Anti-lock brake system)
If the warning light comes on, there is a malfunction of the ABS system (the standard braking system will still function). The vehicle should be driven to a trained and qualified Volvo service ...