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Driver assistance systems
Drive assist sensors and
camer
as
Front radar
Fig. 244
On the front bumper: radar sensors.
Fig. 245
Detection area.
A radar sensor may be fitted to the front
bumper of the v
ehicle
›››
Fig. 244. The front
radar detects any objects in its detection
zone
›››
Fig. 245 and provides support for the
following functions:
●
Front Assist
›››
page 265.
●
Adaptive Cruise Control (ACC)
›››
page 268.
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-
pair
ed by dirt 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 345, Cleaning the exte-
rior . When the radar sensor starts correct-
ly detecting again, the message disap-
pears from the screen and the functions
become available again.
CAUTION
●
If the r
adar sensor is dirty or poorly ad-
justed, the Front Assist system may give un-
necessary warnings and apply the brakes
inappropriately.
●
The oper
ation of the radar 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. 246
On the windscreen: field of vision of
the L
ane Assist system.
Depending on the equipment, the vehicle
may be fitt
ed with a front camera on the front
windscreen
›››
Fig. 246. This camera detects
»
261
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