335 Operation
Driving instructions
Off-road driving rules
Engage the off-road driving program
(page 268) before driving under
off-road conditions.
Vehicles with air suspension package*:
Make sure you select a vehicle level
(page 270) appropriate to the topo-
graphical conditions. Always make
sure the vehicle has enough ground
clearance.
Fasten items being carried as securely
as possible (
page 281).
Always navigate gradients with the en-
gine on and with the transmission en-
gaged in a gear. Switch on the DSR
(page 265) to help maintain a preset
speed.
!
Observe the following during off-road
driving:
Keep doors, tailgate, windows, and
tilt/sliding sunroof* closed whenever driving
off-road.
Adjust vehicle speed to condition of terrain.
The more uneven, rutty and steeper the ter-
rain, the lower the speed should be. Drive
through water slowly at an even speed,
avoiding a bow wave.
Be especially careful when driving in un-
known territory. It may be necessary to get
out of the vehicle and scout the path you in-
tend to take.
Watch out for obstacles, such as rocks,
holes, tree stumps and ruts.
Before driving through water, determine its
depth.
Do not stop vehicle while immersed in water,
and do not shut off the engine.
In sandy soil, drive at a steady speed as al-
lowed by conditions. This helps overcome
the vehicle rolling resistance and reduces
the likelihood of the vehicle sinking into the
ground.
Do not initiate jumps with the vehicle. It
interrupts the forward momentum of the
vehicle.
Always drive onto slopes with the engine
running and the vehicle in gear.
Do not shift automatic transmission to
positionN.Warning!
G
Do not reduce the tire inflation pressure
before driving through sand. However, if you
do so, remember to correct the tire inflation
pressure (
page 375) before continuing
your trip. Driving with reduced tire inflation
pressure increases the risk of losing control
of the vehicle and rolling over.
337 Operation
Driving instructions
Comply with the warnings
(page 333) and rules for off-road
driving (
page 335).
Driving on embankments, slopes and
other steep inclines should only be
done straight up or downhill, i.e. in the
line of gravity. Maximum vehicle climb-
ing ability is a 100% grade which is
equivalent to a slope angle of
45 degrees. Keep in mind that the
climbing ability of the vehicle depends
on terrain conditions.
Shift automatic transmission to
position1 (
page 193).
Drive slowly.
Avoid excessive engine speeds – drive
with moderate engine speeds
(max. 3 000 rpm).
Utilize the engine’s braking power
when descending a slope, observe the
engine speed (do not overrev the en-
gine). Apply the service brake as need-
ed.
Check the brakes after a lengthy down-
grade drive.Traction in steep terrain
The maximum vehicle climbing ability is a
100% grade which is equivalent to a slope
angle of 45 degrees. Keep in mind that the
climbing ability of the vehicle depends on
terrain conditions.
Be easy on the accelerator and watch for
continuous wheel traction when driving in
steep terrain.
Vehicles with air
suspension
package*
1
1
1
1Vehicles with AMG Sport-Package*
2
Raised level
34°
29°
31°
Highway
29°
22°
27°
ML 63 AMG
1
2
Raised level
28°
29°
Highway
23°
24°
i
For maximum engine speed, see “Instru-
ment cluster” (
page 26) and see “Engine”
(
page 534).Warning!
G
To help avoid the vehicle rolling over, never
turn it around on steep inclines. If the vehi-
cle cannot complete the attempted climb,
back it down in reverse gear.
i
The hill start assist system supports you
when driving uphill.
For more information, see “Hill start assist sys-
tem” (page 192).
i
The 4-ETS helps greatly when starting out on
a steep incline when the front wheels have then
the tendency to slip due to the weight shifting
towards the rear axle.
The 4-ETS recognizes the situation and limits the
torque for the front wheels by braking them.
Simultaneously the torque for the rear wheels is
increased.
340 OperationDriving instructionsWhen driving over tree stumps, big rocks
and other obstacles, observe the following
rules:
Make sure the off-road driving program
(page 268) is switched on.
Avoid high engine speeds.
Shift automatic transmission to
position1 (
page 193).
Check the vehicle clearance before
crossing obstacles.
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.Driving on sand
When driving on sand, observe the follow-
ing rules:
Vehicles with air suspension package*:
Set the raised level (
page 270).
Avoid high engine speeds.
Shift automatic transmission into a
gear range that is appropriate for the
terrain.
In sandy soil, drive at a steady speed as
allowed by conditions. This helps over-
come the vehicle rolling resistance and
reduce the likelihood of the vehicle
sinking into the ground.
Drive in tracks of other vehicles if they
are not too deep and if you have suffi-
cient clearance.
Ruts
A number of off-road tracks or other by-
ways have deep ruts which can cause the
underbody to come in contact with the
ground.
Make sure the off-road driving program
(page 268) is switched on.
Vehicles with air suspension package*:
Set the raised level (
page 270).
!
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.
Warning!
G
Do not reduce the tire inflation pressure
before driving through sand. However, if you
do so, remember to correct the tire inflation
pressure (
page 375) before continuing
your trip. Driving with reduced tire inflation
pressure increases the risk of losing control
of the vehicle and rolling over.
346 OperationDriving instructions
Adjust the mirrors (
page 49) to
permit unobstructed view beyond rear
of trailer.
If the trailer has electric brakes, start
your vehicle and trailer moving slowly,
and then apply only the trailer brake
controller by hand to make sure the
brakes are working properly.
Always secure items in the trailer to
prevent load shifts while driving.
When towing a trailer, check occasion-
ally to make sure the load is secure,
and that lighting and trailer brakes (if
so equipped) are functioning properly.
Take into consideration that when tow-
ing a trailer, the handling characteris-
tics are different and less stable from
those when operating the vehicle with-
out a trailer.
It is important to avoid sudden maneu-
vers.
The vehicle and trailer combination is
heavier, and therefore is limited in ac-
celeration and climbing ability, and re-
quires longer stopping distances.
It is more prone to reacting to cross
wind gusts, and requires more sensi-
tive steering input.
If possible, do not brake abruptly, but
rather engage the brake slightly at first
to permit the trailer to activate its
brake. Then increase the braking force.
If the transmission repeatedly shifts
between gears on inclines, manually
shift to a lower gear (select 4, 3, 2 or 1)
(page 193).
A lower gear and reduction of speed re-
duces the chance of engine overload-
ing and/or overheating.
On very steep inclines, not manageable
with automatic transmission in1,
switch on off-road driving program
(page 268).
When going down a long hill, shift into
a lower gear and use the engine’s brak-
ing effect.
Avoid riding the brakes, thus overheat-
ing the vehicle and trailer brakes.
If the engine coolant rises to an ex-
tremely high temperature (coolant tem-
perature needle approaching the red
zone) when the air conditioning is on,
turn off the air conditioning system.
Engine coolant heat can be additionally
vented by opening the windows,
switching the climate control fan speed
to high and setting the temperature
control to the maximum hot position.
!
If the trailer should begin to sway, reduce
the vehicle’s speed immediately.
In no case attempt to straighten out the tow
vehicle and trailer by increasing the speed.
362 OperationEngine compartmentTransmission fluid level
The transmission fluid level does not need
to be checked. If you notice transmission
fluid loss or gear shifting malfunctions,
have an authorized Mercedes-Benz Light
Truck Center check the automatic trans-
mission.Coolant level
The engine coolant is a mixture of water
and anticorrosion/antifreeze. To check
the coolant level, the vehicle must be
parked on level ground.
The coolant expansion tank is located on
the driver’s side of the engine compart-
ment.1Cap
2Coolant expansion tank
3Indicator wall
4Coolant level
Using a rag, turn cap1 slowly approx-
imately one half turn counterclockwise
to release any excess pressure.
Warning!
G
In order to avoid potentially serious burns:
Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature gauge indi-
cates that the coolant is overheated.
Do not remove pressure cap on coolant
reservoir if coolant temperature is
above 158°F (70°C). Allow engine to
cool down before removing cap. The
coolant reservoir contains hot fluid and
is under pressure.
Using a rag, slowly open the cap approx-
imately
1/2 turn to relieve excess pres-
sure. If opened immediately, scalding
hot fluid and steam will be blown out un-
der pressure.
Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene gly-
col which may burn if it comes into con-
tact with hot engine parts.
407 Operation
Vehicle care
Automatic car wash
You can have your car washed in an auto-
matic car wash from the start. Automatic
car washes without brushes are prefera-
ble.
To protect the filter system, switch the
climate control (
page 208) or the au-
tomatic climate control (
page 222)
to air recirculation mode.
If the vehicle is very dirty, prewash it
before running it through the automatic
car wash.Ornamental moldings
For regular cleaning and care of ornamen-
tal moldings, use a damp cloth.
!
Do not clean your vehicle in an automatic
touchless car wash which use caustic spray.
Otherwise the caustic spray will damage the
paint or ornamental moldings.
!
If you want the gear position to remain inN
(for example when the vehicle is pulled through
a car wash)
do not remove the SmartKey from the starter
switch
or, when using KEYLESS-GO*
do not turn off the engine using the
KEYLESS-GO start/stop button* and open
the driver’s door.
Otherwise, the transmission will shift toP and
lock the wheels, preventing the vehicle from be-
ing pulled through a car wash.
!
Make sure that the windshield wiper switch
is set to0 (
page 61). Otherwise, e.g. the rain
sensor could activate and cause the wipers to
move unintentionally. This may lead to vehicle
damage.
Due to the width of the vehicle, fold in exterior
rear view mirrors prior to running the vehicle
through an automatic car wash to prevent
damage to the mirrors.
i
After running the vehicle through an auto-
matic car wash, wipe any wax off of the wind-
shield (
page 410). This will prevent smears
and reduce wiping noise which can be caused by
residual wax on the windshield.
When leaving the car wash, make sure that the
mirrors are folded out. Otherwise they may
vibrate.
!
Do not use chrome cleaner on ornamental
moldings. Although ornamental moldings may
have chrome appearance, they could be made of
anodized aluminum that will be damaged when
cleaned with chrome cleaner. Instead, use a
damp cloth to clean those ornamental moldings.
For very dirty ornamental moldings of which you
are sure are chrome-plated, use a chrome clean-
er. If in doubt whether an ornamental molding is
chrome-plated, contact an authorized
Mercedes-Benz Light Truck Center.
435 Practical hints
What to do if …
Display message
Possible cause/consequence
Possible solution
Depress brake
to shift out of
Park
You have tried to shift the automatic
transmission into positionD,R orN
using the gear selector lever without
depressing the brake pedal.
Depress the brake pedal.
Door Open
Vehicle not in Park
You have opened the driver’s door
and the transmission is still in
positionD,R orN.
Before you leave the vehicle, make sure
that the automatic transmission is set to
positionP and that the parking brake is
engaged.
Drive to workshop
without
shifting gears
The automatic transmission cannot
be shifted out of the set position be-
cause of a malfunction.
If the automatic transmission is set to
positionD:
Without changing the automatic transmis-
sion from positionD, drive to an authorized
Mercedes-Benz Light Truck Center.
If the automatic transmission is set to
positionN,R orP:
Do not drive.
Contact an authorized Mercedes-Benz Light
Truck Center.
438 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
P
Shift to P
You have started the engine or
switched on the ignition with
KEYLESS-GO* and opened the
driver’s door with the automatic
transmission not set to positionP.
Set the automatic transmission to
positionP.
or
Close the driver’s door.
Shift to P or N
to start engine
You have attempted to start the
engine with the KEYLESS-GO*
start/stop button while the auto-
matic transmission was set to
positionR orD.
Set the automatic transmission to
positionP orN.
Make sure the brake pedal is depressed
when attempting to start the engine
with the KEYLESS-GO* start/stop but-
ton.
Only shift to
Park when
vehicle is stationary
You have tried to shift the auto-
matic transmission into positionP
using the gear selector lever
although the vehicle is still in mo-
tion.
Stop the vehicle.
Apply the parking brake (
page 65).