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Driver assistance systems
Drive assist sensors and
camer
as
Fr
ont radar
Fig. 167
On the front bumper: radar sensors.
Fig. 168
Detection area.
A radar sensor may be fitted to the front
bumper of the v
ehicl
e
›››
Fig. 167. The front
radar detects any objects in its detection
zone
›››
Fig. 168 and provides support for the
following functions:
●
Front Assist
›››
page 244.
●
Adaptive Cruise Control (ACC)
›››
page 247.
The radar can have a range of up to 120m
(400ft) depending on road and weather con-
ditions.
WARNING
The visibility of the radar sensor can be im-
paired by dir
t or environmental influences
such as rain, fog, snow, mud, dust, insects
etc. In this case the Front Assist and ACC
functions may stop working. The instrument
panel displays the following message: No
sensor vision! And the Front Assist un-
available or ACC unavailable warning
lights come on.
●
Clean the sensor area on the bumper as
indicated in
›››
page 341, Cleaning the ex-
terior. When the radar sensor starts cor-
rectly detecting again, the message disap-
pears from the screen and the functions
become available again.
CAUTION
●
If the radar sensor is dir
ty or poorly ad-
justed, the Front Assist system may give un-
necessary warnings and apply the brakes
inappropriately.
●
The operation of the r
adar can be affec-
ted by strong reflections of the emitted sig-
nal. This may occur, for example, in an en-
closed car park or due to the presence of
metallic objects (e.g. guard rails or sheets
used in road works).
●
The sensor may not be adjusted correct-
ly if it receives an impact. This may com-
promise the system's efficacy or discon-
nect it. If you have the feeling that the ra-
dar sensor is damaged or adjusted incor-
rectly, switch off the Front Assist and ACC
functions to avoid any damage. If this oc-
curs have it adjusted.
Front camera
Fig. 169
On the windscreen: field of vision of
the L
ane Assist syst
em.
Depending on the equipment, the vehicle
may be fitt
ed with a fr
ont camera on the front
windscreen
›››
Fig. 169. This camera detects
»
237
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