Function of radar sensors
Certain driving and driving safety systems use
radar sensors and cameras to monitor the area
in front, behind or next to the vehicle (depending
on vehicle equipment).
The radar sensors are integrated behind the
bumpers and or behind the radiator trim,
depending on the vehicle equipment. Keep
these components free of dirt, ice or slush. The
sensors must not be covered, e.g. by cycle
racks, overhanging loads or radar reflecting
stickers. After a collision, have the function of
the radar sensors checked at a qualified spe-
cialist workshop as damage (both visible or non-
visible) may have occurred to the bumper or
radiator trim. The driver assistance system may
no longer work properly in such cases.
Overview of driving systems and driv-
ing safety systems
This section contains information on the follow-
ing driving systems and driving safety systems:
R
ABS (Anti-lock Braking System)
R
Active Brake Assist
R
BAS (Brake Assist System)
R
DSR (Downhill Speed Regulation)
R
EBD (Electronic Brake Force Distribution)
R
ESP
®
(Electronic Stability Program)
R
Cruise control
R
Limiter
R
PARKTRONIC
R
Reversing camera
R
360° camera
R
Lane Keeping Assist
R
Traffic Sign Assist
Function of ABS (Anti-lock Braking
System)
G
WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally, further driving safety systems are deac-
tivated. There is an increased danger of skid-
ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
ABS controls the braking pressure in critical sit-
uations:
R
the wheels are prevented from blocking when
braking, e.g. during full brake application or
there is insufficient tyre traction
R
the steerability of the vehicle is ensured when
braking
R
ABS functions above a speed of approx-
imately 4 - 5 km/h.
If ABS intervenes when braking, you will feel a
pulsing in the brake pedal. The pulsating brake
pedal can be an indication of hazardous road
conditions and functions as a reminder to take
extra care while driving.
System limitations
If there is a malfunction and the yellow
#
ABS warning lamp lights up continuously in the
instrument cluster after starting the engine, ABS
may be impaired or without function.
Function of Active Brake Assist
Active Brake Assist consists of:
R
radar and camera-based distance warning
R
situation-dependent braking boosting effect
through Adaptive Brake Assist
R
autonomous braking function
Active Brake Assist can help you to minimise the
danger of collision with vehicles/pedestrians or
reduce the effects of such a collision.
If Active Brake Assist detects that there is a
danger of collision, you will be warned audibly.
If you do not react to the warning tone, autono-
mous braking can be initiated in critical situa-
tions.
In particularly critical situations Active Brake
Assist may directly initiate autonomous braking.
In this case, the warning tone is emitted at the
same time as the vehicle is braked. The warning
lamp
·
also lights up in the instrument clus-
ter.
If you apply the brake yourself in a critical sit-
uation or during autonomous braking, situation-
dependent braking boosting effect is provided.
If necessary, this increases the brake pressure
up to full brake application.
106
Driving systems and driving safety systems
Driv
ing
and
pa
rki
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