Volvo XC90: Lighting / Low beams
When driving with the lighting ring in the
position, low beam will be automatically
activated in weak daylight or dark conditions, when the ignition is in the II
position.

Lighting ring in AUTO position.
With the lighting ring in the
position,
the low beams will be automatically activated if:
the front fog lights* are activated
the rear fog light is activated
the rear and front fog lights are activated.
With the lighting ring in the
position,
low beams will always be on when the ignition is in the II position.
Tunnel detection
The vehicle will detect if it enters a tunnel and shift from daytime running
lights to low beams.
Note that the left-hand steering wheel lever must be in
position for tunnel detection to work.
* Option/accessory.
The vehicle has sensors that detect ambient lighting conditions. With the lighting
ring in the position, the daytime running
lights will always be activated when the ignition is in mode II...
High beam is operated via the left-hand steering wheel lever. High beam is
the vehicle's strongest lighting and should be used when driving in dark conditions,
provided it does not blind other road users, to improve visibility...
Other information:
The function may have limited functionality in certain situations and not
intervene, e.g.:
for smaller vehicles such as motorcycles
if more than half of your vehicle has moved into the adjacent lane
on roads/lanes with indistinct or no side lane markings
outside the speed range 60-140 km/h (37-87 mph)
when speed-dependent power steering wheel resistance is working at reduced
power – e...
(Option/accessory.)
(This function is only available on some markets.)
Curve Speed Assist (CSA) functionality may be reduced in certain situations.
The driver should be aware of the following limitations:
Curve Speed Assist (CSA) may have limited performance on small roads and
in densely populated areas...