The electric parking brake secures the vehicle
automatically if the HOLD function is activated
when the vehicle is stationary and:
R
a system malfunction occurs
R
the power supply is insufficient
If a malfunction occurs, the transmission may
also be shifted to position
j
automatically.
DSR
General notes
DSR (Downhill Speed Regulation) is an aid to
assist you when driving downhill that is available
only in vehicles with the Off-Road Engineering
package.
It keeps the speed of travel at the speed selec-
ted on the on-board computer. The steeper the
downhill gradient, the greater the DSR braking
effect on the vehicle. When driving on flat
stretches of road or on an uphill gradient, the
DSR braking effect is minimal or nonexistent.
DSR controls the vehicle’s speed when it is acti-
vated and the transmission is in position
h
,
k
or
i
. You can drive at a higher or a lower speed
than that set on the on-board computer at any
time by accelerating or braking.
Important safety notes
G
WARNING
If the speed driven and the set speed deviate
and you activate DSR on a slippery road sur-
face, the wheels may lose traction. There is an
increased danger of skidding and accidents.
Before switching DSR on, please take into
consideration the road surface and the differ-
ence between driving speed and the set
speed.
DSR can neither reduce the risk of accident if
you fail to adapt your driving style nor override
the laws of physics. DSR cannot take account of
road, weather and traffic conditions. DSR is only
an aid. You are responsible for maintaining a
safe distance to the vehicle in front, for vehicle
speed, for braking in good time and for staying in
lane.
You are always responsible for keeping control
of the vehicle and for assessing whether the
downhill gradient can be managed. DSR may not
always be able to keep to the set speed, depend-
ing on road surface and tire conditions. Select a
set speed suitable for the prevailing conditions
and when necessary, apply the brakes manually.
Further information about "Driving off-road"
(
Y
page 165).
Activating/deactivating DSR
If you activate DSR and no speed has been set,
the vehicle decelerates to 4 mph (6 km/h).
You can activate DSR only when driving at
speeds below 25 mph (40 km/h).
X
To switch on: press button
:
.
Indicator lamp
;
lights up.
The status indicator on the multifunction dis-
play shows e.g.
DSR 6 km/h
.
If the current vehicle speed is too high, the DSR
symbol appears on the multifunction display
with the
Max. Speed 40 km/h
message.
If you enter or exit a parking space using Parking
Pilot and press button
:
, indicator lamp
;
flashes. DSR can then not be switched on.
X
To switch off: press button
:
.
Indicator lamp
;
goes out.
The DSR symbol appears on the multifunction
display with the
Off
message.
DSR switches off automatically if you drive at
speeds greater than 28 mph (45 km/h). The
DSR symbol appears on the multifunction dis-
play with the
Off
message. A warning tone also
sounds.
180
Driving systems
Driving
and
parking
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