See also:

Returning to mode I from mode II
With the remote key fully pressed into the ignition slot, press START/STOP ENGINE briefly. ...

Summary
The camera is activated when the gear selector is moved to R (this can be changed in the MY CAR menu) and the image is shown on the center console display. When backing up, two solid lines are ...

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 ...