System limits
Safety note
WARNING
The system may not respond at all, or may re‐
spond too late, incorrectly or without justifica‐
tion due to system limitations. There is a risk of
accident or material damage. Observe the in‐
formation on the system limits and intervene
actively if necessary.
System limits of the sensors
For further information:
▷ Cameras, see page 47.
▷ Radar sensors, see page 48.
Functional limitations
The system may have limited functionality in the
following situations, for example:
▷ If the speed of the approaching vehicle is sig‐
nificantly higher than the driver's own speed.
▷ On sharp bends or narrow roads.
▷ When there are missing, worn, poorly visible,
merging/separating or ambiguous lane mark‐
ings; for example, in areas where there are
roadworks.
▷ If lane markings are covered by snow, ice, dirt
or water.
▷ If lane markings are not white.
▷ If lane markings are obscured by objects.
▷ If the vehicle is too close to the vehicle ahead.
▷ Up to 10 seconds after starting the engine
using the Start/Stop button.
A Check Control message is displayed in the
event of limited functionality.
The system cannot be switched on when the
trailer socket is in use, for example when operat‐
ing with a trailer or bicycle carrier. A Check Con‐
trol message is shown.
Rear collision prevention
Principle
The system responds to vehicles approaching
from behind.
General
Radar sensors monitor the area behind the vehi‐
cle.
If a vehicle is approaching from behind at a rele‐
vant speed, the system responds as follows:
▷ The hazard warning lights are switched on to
warn the traffic behind if there is a risk of a
rear collision.
▷ Active Protection: if a collision appears un‐
avoidable, PreCrash functions are triggered.
Safety notes
WARNING
The system does not relieve you of your per‐
sonal responsibility to assess the visibility con‐
ditions and traffic situation correctly. There is a
risk of accident. Adapt your driving style to the
traffic conditions. Observe the traffic situation
and intervene actively if the situation warrants it.
Seite 234
CONTROLS
Safety
234
Online Edition for Part no. 01405A1EA53 - X/20
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