Volvo XC90 2018 Owner's Manual page 158

LIGHTING
|| Press the button to switch the lights on/off. The
symbol in the driver display illuminates
when the rear fog lamp is switched on.
The rear fog lamp is switched off automatically
when:
the car is switched off or when the rotating
•
ring on the stalk switch is set to the
position
the stalk switch's rotating ring is in position
•
and the front fog lamps are switched
off.
NOTE
Regulations on the use of rear fog lamps vary
from country to country.
Related information
Lighting control (p. 146)
•
Front fog lamps/cornering lights* (p. 155)
•
Ignition positions (p. 414)
•
156
Brake lights
The brake light automatically comes on during
braking.
The brake light is illuminated when the brake
pedal is depressed and when the car is braked
automatically by one of the driver support sys-
tems.
Related information
Emergency brake lights (p. 156)
•
Brake functions (p. 417)
•
Driving support systems (p. 286)
•
Emergency brake lights
Emergency brake lights are activated to alert
vehicles behind about heavy braking.
The function means that the brake light flashes
instead of - as in normal braking - shining with a
constant glow.
The emergency brake lights are activated during
heavy braking or if the ABS system is activated at
high speeds.
After the driver brakes to a low speed and then
releases the brake, the brake light returns to nor-
mal glow.
The car's hazard warning flashers are activated at
the same time. These flash until the driver accel-
erates the car to a higher speed again or
switches off the car's hazard warning flashers.
Related information
Brake lights (p. 156)
•
Foot brake (p. 417)
•
Hazard warning flashers (p. 157)
•
* Option/accessory.