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the stopping distance on off-road terrain. This
limits steering capability.
BAS (Brake Assist System)
General information
BAS operates in emergency braking situations.
If you depress the brake pedal quickly, BAS
automatically boosts the braking force, thus
shortening the stopping distance.
Important safety notes
i
Observe the "Important safety notes" sec-
tion (Y page 60).
G
WARNING
If BAS is malfunctioning, the braking dis-
tance in an emergency braking situation is
increased. There is a risk of an accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking
X
Keep the brake pedal firmly depressed until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated.
Active Brake Assist
General information
i
Observe the "Important safety notes" sec-
tion (Y page 60).
Active Brake Assist consists of a distance
warning function with an autonomous braking
function and a situation-dependent brake
boosting effect.
Active Brake Assist can help you to minimize
the risk of a collision with the vehicle traveling
in front or reduce the effects of such a colli-
sion.
If Active Brake Assist detects that there is a
risk of collision, you will be warned visually
and acoustically. If you do not react to the vis-
ual collision warning or the warning tone,
autonomous braking can be initiated in critical
situations. If you apply the brake yourself in a
critical situation, Active Brake Assist supports
you with a situation-dependent brake boosting
effect.
Important safety notes
Detection of hazardous situations can be par-
ticularly impaired if:
R
There is dirt on the sensors or anything else
covering the sensors
R
There is snow or heavy rain
R
There is interference by other radar sources
R
There are strong radar reflections, for exam-
ple in parking garages
R
A narrow vehicle is traveling in front, e.g. a
motorbike
R
A vehicle is traveling in front on a different
line
R
You are driving a new vehicle or servicing on
the Active Brake Assist system has just
been carried out
Observe the important safety notes in the
"Breaking-in notes" section (Y page 124).
Following damage to the front end of the vehi-
cle, have the configuration and operation of
the radar sensor checked at a qualified spe-
cialist workshop. This also applies to collisions
at low speeds where no visible damage to the
front of the vehicle is apparent.
Activating/deactivating
Active Brake Assist is active after every igni-
tion cycle.
You can activate or deactivate Active Brake
Assist (Y page 197) in the on-board com-
puter. When deactivated, the distance warning
function and the autonomous braking function
are also deactivated.
If Active Brake Assist is deactivated, the æ
symbol appears in the assistance graphic dis-
play.
If you have activated DSR, Active Brake Assist
is deactivated. For further information on DSR,
see (Y page 169).
Driving safety systems
61
Safety
Z
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