Volvo XC90: Lighting / Rear fog light
The rear fog light is considerably brighter than ordinary taillights and should
only be used to help other road users see the vehicle when visibility is reduced
by conditions such as fog, snow, smoke or dust.

Rear fog light button.
The fog lights are located on the right and left sides of the rear of the vehicle.
The rear fog light can only be used when:
- ignition mode II is active and the lighting ring is in position
or

- the lighting ring is in the
position and the front fog lights are on.
Press the button to switch on/off. The
symbol in the instrument panel illuminates
when the rear fog light is on.
The rear fog light turns off automatically when:
- the ignition is off or the lighting ring is in the
position.
- the lighting ring is in the
position and the front fog lights are turned off.
NOTE
Regulations concerning rear fog light use vary from country to country.
(Option/accessory)
The fog lights can be activated manually when driving in fog and are activated
automatically when backing up to help augment the backup light...
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...
Other information:
The battery in the remote key must be replaced when it is discharged.
NOTE
All batteries have a limited service life and must eventually be replaced
(does not apply for Key Tag). The battery's service life varies depending on how
often the vehicle/key is used...
Activating and deactivating
An integrated compass1 in the upper right corner of the rearview
mirror shows the direction the vehicle is traveling.
The compass is automatically activated when the vehicle is started.
To deactivate/activate the compass manually:
Use a paper clip or similar object to press the button on the bottom of
the mirror...