Mercedes-Benz Sprinter Operator's Manual page 62

Driving safety systems
60
The brakes function as usual again if:
you release the brake pedal
R
there is no longer any danger of a collision
R
no obstacle is detected in front of your
R
vehicle
Adaptive Brake Assist is then deactivated.
Up to the maximum vehicle speed, adaptive
Brake Assist can react to moving obstacles
that have already been recognized as such at
least once over the period of observation.
Adaptive Brake Assist does not react to sta-
tionary obstacles.
In particular, the detection of obstacles can
be impaired if:
dirt on the sensors or anything else cover-
R
ing the sensors
it is snowing or raining heavily
R
there is interference from other radar sour-
R
ces
there are strong radar reflections, for
R
example in parking garages
a narrow vehicle is traveling in front, e.g. a
R
motorbike
a vehicle is traveling in front on a different
R
line
If adaptive Brake Assist is not available due
to a malfunction in the radar sensor system,
the full brake boosting effect with the help of
BAS remains available.
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 colli-
sions at slow speeds where there is no visible
damage to the front of the vehicle.
ASR (acceleration skid control)
General notes
Important safety notes
ASR can neither reduce the risk of an accident
nor suspend the laws of physics if the driver
does not pay attention when pulling away or
accelerating. ASR is only an aid. Always adapt
your driving style to suit the prevailing road
and weather conditions.
Vehicles without steering wheel buttons: if
ASR is malfunctioning, the : indicator
lamp lights up while the engine is running and
the engine power may be reduced
( page 221).
Y
ASR significantly improves traction, i.e. the
transmission of power from the tires to the
road surface, and thus increases the vehicle's
driving stability. If the driving wheels start to
spin, ASR brakes individual drive wheels and
limits the engine torque. ASR thus signifi-
cantly assists you when pulling away and
accelerating, especially on wet or slippery
roads.
If traction on the road surface is not sufficient,
even ASR will not allow you to pull away with-
out difficulty. The type of tires and total
weight of the vehicle as well as the gradient
of the road also play a crucial role.
If ASR intervenes, the d warning lamp in
the instrument cluster flashes.
Activating/deactivating ASR
G WARNING
If deactivated, ASR will not attempt to stabi-
lize the vehicle during pulling away and accel-
eration. There is an increased risk of skidding
and of an accident.
Only deactivate ASR in the situations descri-
bed in the following.
! If you deactivate ASR, ESP
vene to stabilize the vehicle. Frequent brak-
ing automatically triggered by ESP
damage the brake system.
For this reason, deactivate ASR only briefly
and when absolutely necessary.
®
will still inter-
®
can