Volvo XC90: Lighting / Hazard warning flashers
Hazard warning flashers warn other road users by all of the vehicle's turn
signals being activated at the same time. The function can be used to warn about
a traffic hazard.

Hazard warning flashers button.
Press the button to activate the hazard warning flashers.
NOTE
Regulations concerning the use of hazard warning flashers may vary from
country to country.
The brake lights are automatically illuminated when braking.
The brake lights are illuminated when the brake pedal is depressed and when the
brakes are automatically applied by a driver support system...
Some of the exterior lights remain on to illuminate the area around the vehicle.
This is called home safe lighting.
To activate home safe lighting:
Switch off the ignition...
Other information:
Incorrectly connected or installed software or diagnostic tools may have an
adverse effect on the vehicle's electronics.
We strongly recommend that Volvo owners use only genuine, Volvo-approved accessories,
and that accessory installations be performed only by a trained and qualified Volvo
service technician...
The high beam bulbs in the halogen headlights can be changed without the help
of a workshop.
Before the bulbs can be replaced, the plastic covering over the headlight must
be removed.
Before the lamp can be replaced, the rectangular headlight cover must be removed...