Page 218 of 376

218 OperationDriving instructions
Comply with the warnings
(page 214) and rules for off-road
driving (
page 214).
Switch off the exterior lamps as well as
the climate control.
Select gear range2 or1 on the auto-
matic transmission (
page 142).
Enter the water only at a shallow spot,
driving at walking speed.
Do not stop vehicle while immersed in
water, and do not shut off the engine.
There is a very high level of driving re-
sistance in water. The surface is slip-
pery and may not be firm, making
pulling away in water difficult and dan-
gerous.
Clean mud off the tire tread after driv-
ing through water.
To dry the brakes, apply pressure to the
brake pedal several times after leaving
the water.
Crossing obstacles
!Never accelerate before driving into
the water. The bow wave could force
water into the engine and auxiliary
equipment, thus damaging them.
!If possible, use the assistance of a sec-
ond person outside the vehicle to scout
the path you intend to take and check
for adequate ground clearance when
you cross obstacles with your vehicle.
The person assisting you outside the
vehicle should always be a safe dis-
tance away from the vehicle and posi-
tioned so that he or she cannot get hurt
in case of any unexpected vehicle
movement.
After off-road driving or crossing obsta-
cles, inspect vehicle for any damage,
especially vehicle undercarriage and
suspension components. Failure to do
so can adversely affect the vehicle’s fu-
ture performance, including increased
chance of an accident.
Page 219 of 376

219 Operation
Driving instructions
Check the vehicle clearance before
crossing obstacles.
Comply with the warnings
(page 214) and rules for off-road
driving (
page 214).
Select gear range1 on the automatic
transmission (
page 142).
Cross obstacles (e.g. tree stumps or
big rocks) very slowly by aiming one of
the front wheels at the center of the ob-
stacle, and repeat same with the rear
wheel.Ruts
Check the vehicle clearance before
driving in ruts.
Comply with the warnings
(page 214) and rules for off-road
driving (
page 214).
Select gear range1 on the automatic
transmission (
page 142).
Drive slowly next to the ruts rather than
through them if at all possible.
!Special attention is needed when you
cross obstacles on a steep incline.
The vehicle could slide sideways as a
result of its possible slanted position
which in turn may result in the vehicle
tipping or rolling over.
!A number of off-road tracks or other by-
roads have deep ruts. If the vehicle
does not have enough ground clear-
ance:
it could be damaged
the underside of the vehicle may
come down on a surface and re-
main stuck
After off-road driving or crossing obsta-
cles, inspect vehicle for any damage,
especially vehicle undercarriage and
suspension components. Failure to do
so can adversely affect the vehicle’s fu-
ture performance, including increased
chance of an accident.
Page 221 of 376

221 Operation
Driving instructions
Clean all exterior lamps and check
them for possible damage.
Check for brush or branches caught in
the undercarriage.
They could increase the possibility of a
fire, as well as cut fuel and/or brake
lines, puncture rubber bellows of the
axles or drive shafts.
After continued operation in mud,
sand, water or other dirty conditions,
clean the brake discs, wheels, brake
pads and check and clean axle joints.
Conduct a brake test.Control and operation of radio trans-
mitters
COMAND, radio and telephone*Telephones and two-way radios
Radio transmitters, such as a portable tele-
phone or citizens band unit should only be
used inside the vehicle if they are connect-
ed to an antenna that is installed on the
outside of the vehicle.
Refer to the radio transmitter operation in-
structions regarding use of an external an-
tenna.Warning!
G
Do not forget that your primary responsibili-
ty is to drive the vehicle safely. Only operate
the COMAND, radio or telephone
1 if road,
traffic and weather conditions permit.
Bear in mind that at a speed of just 30 mph
(approximately 50 km / h), your vehicle is
covering a distance of approximately
50 feet (approximately 14 m) every second.
1Observe all legal requirements.
Warning!
G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and/or
personal injury.
Page 240 of 376

240 OperationWinter driving
Winter drivingBefore the onset of winter, have your vehi-
cle winterized at an authorized
Mercedes-Benz Light Truck Center. This
service includes:
Check of anticorrosion and antifreeze
concentration.
Addition of cleaning concentrate to the
water of the windshield and headlamp
cleaning system. Add MB Concentrate
“S” to a premixed windshield washer
solvent/antifreeze which is formulated
for below freezing point temperatures
(page 339).
Battery test. Battery capacity drops
with decreasing ambient temperature.
A well charged battery helps to ensure
the engine can be started even at low
ambient temperatures.
Tire change. Mercedes-Benz recom-
mend M+S rated radial-ply tires with a
minimum tread depth of approximately 1⁄6in (4 mm) on all four wheels for the
winter season.
Winter tires
Always use winter tires at temperatures
below 45°F (7°C) and whenever wintry
road conditions prevail. Use of winter tires
is the only way to achieve the maximum ef-
fectiveness of the ABS, ESP, EBB and
4-ETS in winter operation.
For safe handling, make sure all winter
tires mounted are of the same make and
have the same tread design.
Always observe the speed rating of the
winter tires installed on your vehicle. If the
maximum speed for which your tires are
rated is below the speed rating of your ve-
hicle, you must place a notice to this effect
where it will be seen by the driver. Such no-tices are available at your tire dealer or any
authorized Mercedes-Benz Light Truck
Center.
Block heater (Canada only)
The engine is equipped with a block heat-
er.
The electrical cable may be installed at
your authorized Mercedes-Benz Center.
Warning!
G
Winter tires with a tread depth under
1⁄6in
(4 mm) must be replaced. They are no long-
er suitable for winter operation.
Warning!
G
If you use your spare tire when winter tires
are fitted on the other wheels, be aware that
the difference in tire characteristics may
very well impair turning stability and that
overall driving stability may be reduced.
Adapt your driving style accordingly.
Have the spare tire replaced with a winter
tire at the nearest authorized
Mercedes-Benz Light Truck Center.
Page 241 of 376
241 Operation
Winter driving
Snow chains
Snow chains should only be driven on
snow-covered roads at speeds not to ex-
ceed 30 mph (50 km/h). Remove chains
as soon as possible when driving on roads
without snow. Observe the following guidelines when us-
ing snow chains:
Use of snow chains is not permissible
on all wheel/tire combinations.
Snow chains should only be used on all
four wheels. With only two chains avail-
able, they should be mounted on the
rear wheels. Follow the manufacturer’s
mounting instructions.
Only use snow chains that are ap-
proved by Mercedes-Benz. Your autho-
rized Mercedes-Benz Light Truck
Center will be glad to advise you on this
subject.
Use of snow chains may be prohibited
depending on location. Always check
local and state laws before installing
snow chains.
iWhen driving with snow chains, you
may wish to deactivate the ESP
(page 79) before setting the vehicle
in motion. This will improve the
vehicle’s traction.
Page 252 of 376

252 Practical hintsWhat to do if …
What to do if …Lamps in instrument clusterGeneral information:
If a bulb in the instrument cluster fails to
come on during the bulb self-check when turning the SmartKey in starter switch to
position2, have it checked and replaced if
necessary.Problem
Possible cause
Suggested solution
-
The yellow ABS indicator lamp
comes on while driving.
You engaged the differential locks. The ABS,
ESP, BAS, EBB and 4-ETS are switched off.
The driving systems will switch on
again after the differential locks have
been disengaged.
The ABS has detected a malfunction and has
switched off. The ESP, BAS, EBB and 4-ETS
are also switched off (see messages in dis-
play).
If the ABS control unit is malfunctioning, oth-
er systems such as the navigation system or
Rear Parking Assist* may also malfunction.
The brake system is still functioning normally
but without the ABS available.
Continue driving with added caution.
Wheels will lock during hard braking
reducing steering capability.
Have the system checked at an autho-
rized Mercedes-Benz Light Truck Cen-
ter as soon as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Page 257 of 376

257 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
v
The yellow ESP warning lamp
comes on and remains on while
driving.
You engaged the differential locks. The ABS,
ESP, BAS, EBB and 4-ETS are switched off.
The driving systems will switch on
again after the differential locks have
been disengaged.
Also note the messages in the multi-
function display (
page 260).
The ESP is deactivated.
Risk of accident! Adapt your speed and driv-
ing to the prevailing road conditions.
Turn the ESP back on (
page 81).
If the ESP cannot be turned back on, have
the system checked at an authorized
Mercedes-Benz Light Truck Center as
soon as possible.
The ESP is deactivated because of interrupt-
ed power supply. The ABS may still be opera-
tional. The ESP has to be synchronized.
Note the messages in the multifunc-
tion display (
page 260).
The ESP, ABS, BAS, EBB or 4-ETS has detect-
ed a malfunction. All driving systems are
switched off.
Risk of accident! Adapt your speed and driv-
ing to the prevailing road conditions.
Note the messages in the multifunc-
tion display (
page 260).
Page 261 of 376

261 Practical hints
What to do if …
Text messagesDisplay symbol
Display message
Possible cause
Possible solution
ABS
ABS SYSTEM
VISIT WORKSHOP!
The ABS has detected a malfunction and
has switched off. The ESP, BAS, EBB and
4-ETS are also deactivated.
The brake system is still functioning nor-
mally but without the ABS available.
Wheels will lock during hard braking, re-
ducing steering capability.
Continue driving with added caution.
Have the system checked at an autho-
rized Mercedes-Benz Light Truck Cen-
ter as soon as possible.
Failure to follow these instructions in-
creases the risk of accident.
VISIT WORKSHOP!
DISPLAY MALFUNCTION:
The ABS or the ABS display is malfunc-
tioning.
Wheels will lock in hard braking reducing
steering capability.
Continue driving with added caution.
Have the system checked at an autho-
rized Mercedes-Benz Light Truck Cen-
ter as soon as possible.
Failure to follow these instructions in-
creases the risk of accident.
BAS
BRAKE ASSIST
VISIT WORKSHOP!
The BAS has detected a malfunction and
switched off.
The brake system is still functioning nor-
mally but without the BAS available.
Wheels will lock in hard braking reducing
steering capability.
Continue driving with added caution.
Have the system checked at an autho-
rized Mercedes-Benz Light Truck Cen-
ter as soon as possible.
Failure to follow these instructions in-
creases the risk of accident.