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:
BLIS1 functionality may be reduced in certain situations.
Keep the marked area clean (on both the left and right sides
of the vehicle)2.
Examples of limitations:
Dirt, ice and snow covering the sensors may reduce functionality and prevent
the system from providing warnings...
Resetting the trip odometer using the leftside steering wheel lever.
Reset all information in trip odometer TM (i.e. mileage, average fuel consumption,
average speed and driving time) by pressing and holding the RESET button
on the left-hand steering wheel lever...