LIGHTING
longer blocked, the message goes out and the
symbol illuminates.
Active main beam
position
. When active main beam is
illuminates with a
Active main beam is a function which uses a
camera sensor at the top edge of the wind-
screen to detect the headlamp beams from
oncoming traffic or the rear lights of vehicles
in front, and then switches from main beam
to dipped beam.
activated, the symbol
white glow in the driver display. When main
beam is activated, the symbol shines blue.
WARNING
Active main beam is an aid for using the
optimum beam pattern when conditions
are favourable.
If active main beam is deactivated while main
beam is on, the lighting is immediately reset to
dipped beam.
The driver always bears responsibility for
manually switching between main and
dipped beam when traffic situations or
weather conditions so require.
Active main beam does not need to be reacti-
vated every time the car is started.
Limitations for active main beam
The camera sensor on which the function is
based has limitations.
Related information
Lighting control (p. 138)
•
•
•
If this symbol is shown in the driver
display, together with the message
Active High Beam Temporarily
Using main beam (p. 142)
Limitations for camera and radar unit
(p. 395)
unavailable, then switching
between main and dipped beam must be per-
The symbol
represents active main beam.
formed manually. The
symbol extin-
guishes when these message are shown.
The function can start while driving in the dark
when the car's speed is approx. 20 km/h
(approx. 12 mph) or higher. The function can
also take streetlights into account. When the
camera sensor no longer detects any oncom-
ing car or car in front, main beam is switched
on again after about a second.
The same applies if this symbol is
shown together with the message
Windscreen sensor Sensor
blocked, see Owner's manual.
Active main beam may be temporarily unavail-
able e.g. in situations with dense fog or heavy
rain. When active main beam becomes availa-
ble again, or the windscreen sensors are no
Activate active main beam
Active main beam is activated and deactivated
by turning the left-hand stalk switch to posi-
tion
. The rotating ring then returns to
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English 
