the distance to the vehicle in front, for vehicle
speed, for braking in good time and for staying in
your lane.
! Never tow the vehicle with one axle raised.
This may damage the transfer case. Damage
of this sort is not covered by the Mercedes-
Benz Limited Warranty. All wheels must
remain either on the ground or be fully raised.
Observe the instructions for towing the vehi-
cle with all wheels in full contact with the
ground.
! A function or performance test should only
be carried out on a two-axle dynamometer.
Before you operate the vehicle on such a
dynamometer, please consult a qualified
workshop. You could otherwise damage the
drive train or the brake system.
i In wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if you
use winter tires (M+S tires), with snow chains
if necessary.
Further information about "Driving off-road"
( Y
page 186).
DSR (Downhill Speed Regulation)
General notes DSR is an aid to assist you when driving down-
hill. It keeps the speed of travel at the speed
selected on the on-board computer. The steeper
the downhill gradient, the greater the DSR brak-
ing 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 D , R or
N . 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. If you fail to adapt your driving style, DSR can
neither reduce the risk of accident 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 the distance to
the vehicle in front, for vehicle speed, for brak-
ing in good time and for staying in your 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.
Activating DSR
X
Press button C .
Indicator lamp D lights up.
The
You can select the Offroad Plus drive program at
speeds below 25 mph (40 km/h).
The Offroad Plus drive program automatically
switches to the Offroad drive program if you
drive faster than 30 mph (45 km/h). The Drive
more slowly message appears in the multi-
function display.
Further information about "Driving off-road"
( Y
page 186).
LOW RANGE offroad gear (vehicles with
the Offroad Engineering package) Important safety notes
G WARNING
If you select the LOW RANGE off-road gear on
a slippery road surface, the wheels could lose
traction: R
if you remove your foot from the accelera-
tor pedal when driving R
if off road ABS intervenes when braking
If the wheels lose traction. the vehicle can no
longer be steered. There is an increased dan-
ger of skidding and accidents.
Never select the LOW RANGE off-road gear
when driving on slippery road surfaces.
G WARNING
If you do not wait for the transfer case gear
change process to complete, the transfer
case could remain in the neutral position. The
power transmission to the driven wheels is
then interrupted. There is a danger of the
vehicle rolling away unintentionally. There is a
risk of an accident.
Wait until the transfer case shift process is
completed.
Do not turn off the engine while changing gear
and do not shift the automatic transmission to
another position. General notes
C
LOW RANGE offroad gear button D
LOW RANGE offroad gear indicator lamp
HIGH RANGE
Position for all normal on-
road driving conditions
LOW RANGE
Offroad position for driving
off-road and fording
The transmission ratio
between the engine and
wheels is only approx-
imately one third of that in
the HIGH RANGE road posi-
tion. Drive torque is thus
proportionately higher.
Do not use LOW RANGE: R
on slippery road surfaces,
e.g. in the case of slush R
on snow or ice-covered
roads R
if you have mounted snow
chains to your vehicle
The LOW RANGE offroad gear assists you in
driving off-road and when fording. When LOW
RANGE is engaged, the engine’s performance
characteristics and the gearshifting character-
istics of the automatic transmission are adapted
for this purpose.
Further information about "Driving off-road"
( Y
page 186). You will find information about
driving safety systems in conjunction with
LOW RANGE in the "Safety" section ( Y
page 66).Driving systems 239
Driving and parking Z
From HIGH RANGE to LOW RANGE
! On ly change from LOW RANGE to HIGH
RANGE if: R
the engine is running.R
the transmission is in position NR
you are driv ing at a speed below 40 km /hX
Press LOW RANGE button C .
Indic ator lamp D flashes.
When the gear change is co mple te, indicator
lamp D lights up. LOW RANGE indicator
appears in the multifunction displ ay and in the
status indicator.
While indicator lamp D is flashing, you can
cancel the gear change by pressing LOW
RANGE button C again.
i You cannot activate LOW RANGE if the
SPORT driv e program is activated. The LOW
RANGE Not in Drive Program "Sport"
message then appears in the multifunction
displ ay.
From LOW RANGE to HIGH RANGE
! On ly change from LOW RANGE to HIGH
RANGE if: R
the engine is running.R
the transmission is in position NR
you are driv ing at a speed below 70 km /h
X
Press LOW RANGE button C .
Indic ator lamp D flashes.
When the gear change is co mple te, indicator
lamp D goes out. In the multifunction dis-
play, the LOW RANGE Off message appears
and status indicator
Messages in the multifunction display If a gear change process has not been successful, the following messages may be displayed in the
multifunction display:
Display messages
Possible causes/consequences and P Solutions
LOW RANGE Max.
Speed 24 mph You have been driving faster than 24 mph (40 km/h). Additionally, the
indicator lamp on the button in the center console is flashing. X
Drive more slowly to carry out the gear change process.
LOW RANGE Shift to
Position N Briefly The transmission is in position D and you are driving at below
40 km/h. X
Shift the transmission to N to complete the gear change process.
LOW RANGE Shifting
Canceled Please
Reactivate The gear change process was not carried out. X
Ensure that all gear change conditions are fulfilled and carry out the
gear change process again.
LOW RANGE Stop
Apply Parking Brake A warning tone also sounds. The gear change process has not been
completed. LOW RANGE is in the neutral position. There is no con-
nection between the engine and the drive wheels.
! Do not drive any further. You could otherwise damage the vehi-
cle's drive train. X
Stop the vehicle. Take into account the road and traffic conditions
when doing this. X
Depress the electric parking brake ( Y
page 179).X
Carry out the gear change process again.
If the gear change process has been carried out, the LOW RANGE
Stop Apply Parking Brake message disappears.
Driving dynamics display in the
COMAND display (vehicles with the Off-
road Engineering-package)
General notes
The driving dynamics display allows you to see
the selected drive program and additional infor-
mation about the vehicle's operating status in
the COMAND display.
C
Drive program selected
D
Status of the differential lock for the transfer
case