Asr (Acceleration Skid Control); Braking; Activating/Deactivating Asr - Mercedes-Benz Sprinter Operating Instructions Manual

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.
If ABS is malfunctioning, other systems will
also fail, including driving safety systems.
Observe the information relating to the !
warning lamp ( page 222).
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ABS regulates brake pressure in such a way
that the wheels do not lock when you brake.
This allows you to continue steering the vehi-
cle when braking.
ABS works from a speed of about 5 mph
(8 km/h), regardless of road-surface condi-
tions. ABS works on slippery surfaces, even
when you only brake gently.
The yellow ! warning lamp in the instru-
ment cluster lights up when the ignition is
switched on. The lamp goes out when the
engine starts running.

Braking

If ABS intervenes when braking, you will feel a
pulsating in the brake pedal.
The pulsating brake pedal can be an indica-
tion of hazardous road conditions and func-
tions as a reminder to take extra care while
driving.
If ABS intervenes: continue to depress the
X
brake pedal with force until the braking sit-
uation is over.
To make a full brake application:
X
depress the brake pedal with full force.
Driving safety systems

ASR (acceleration skid control)

General notes
Important safety notes
Observe the important safety guidelines for
the driving safety system (
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.
If you activate or deactivate the all-wheel
drive in a vehicle with this option, ASR will be
deactivated for the duration of the activa-
tion/deactivation process.
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 222).
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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.
59
page 58).
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