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Stability Control Assist is operational at speeds
above approximately 20 km/h, regardless of the
operating status of the service brake or continu‐
ous brake. If Stability Control Assist intervenes,
the Á indicator lamp in the instrument cluster
flashes.
When the engine is running and the Á indica‐
tor lamp in the instrument cluster lights up per‐
manently, Stability Control Assist is malfunction‐
ing. Have Stability Control Assist checked at a
qualified specialist workshop.
Regardless of the vehicle load or road surface
conditions, Stability Control Assist reduces the
risk of the following situations:
the tractor/semitrailer combination or draw‐
R
bar combination start skidding
the tractor/semitrailer combination or draw‐
R
bar combination jack-knifing
the tractor/semitrailer combination or draw‐
R
bar combination tipping
Stability Control Assist stabilises a tractor/semi‐
trailer combination or drawbar combination with
a maximum of two trailers/semitrailers using the
following automatic control interventions:
engine output reduction
R
targeted braking of individual wheels on the
R
towing vehicle
targeted braking of the trailer/semitrailer
R
braking the entire tractor/semitrailer combi‐
R
nation or drawbar combination
When driving with more than two trailers/semi‐
trailers, the Stability Control Assist must be deac‐
tivated.
Deactivating/activating Stability Control
Assist
& WARNING Risk of skidding and accident
by deactivating Stability Control Assist
If you deactivate Stability Control Assist, Sta‐
bility Control Assist does not stabilise the
vehicle.
Only deactivate Stability Control Assist
#
in the situations described in the follow‐
ing.
%
When you start the engine, Stability Control
Assist is automatically activated.
It may be better to deactivate Stability Control
Assist in the following situations:
when driving on a loose surface
R
when driving with snow chains
R
when operating a snow plough
R
ASR is also deactivated. Activate Stability Control
Assist as soon as the situations previously descri‐
bed are no longer present.
If you drive with more than two trailers/semitrail‐
ers, you must deactivate Stability Control Assist.
Otherwise, malfunctions or faults can occur as a
result.
1
Stability Control Assist OFF button (example)
Press the k button.
#
If the k indicator lamp in the instrument
cluster lights up, Stability Control Assist is
deactivated.
Using differential locks
& WARNING Risk of accident with differen‐
tial lock engaged
If you switch on the automatic drive program
when driving off-road or with the differential
lock engaged, the electronic management
system may intervene when this is undesired.
Due to the interruption in the tractive power,
the vehicle can roll back on uphill gradients,
for example.
Always drive carefully and be ready to
#
brake.
Switch to the manual drive program in
#
particularly demanding driving situa‐
tions.
Driving mode 229
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