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:
Vehicles with the Start/Stop function are equipped with two batteries – a
more powerful 12 V start battery and a support battery that provides stronger current
during the function's start sequence.
The 12 V support battery is located in a box next to the spring
strut in the engine compartment...
(Option/accessory)
The second row of seats can be adjusted to make it easier to get in and out
of the third row of seats*.
The illustration is generic.
To fold down the backrest:
Pull the handle on the upper side of the right or left outboard second row
seat upward/forward...