199 Controls in detail
Driving systems
Lift the cruise control lever in direction
of arrow1 and hold it up until the
desired speed is reached.
Release the cruise control lever.
The new speed is set.Setting a lower speed
Depress the cruise control lever in
direction of arrow2 and hold it down
until the desired speed is reached.
Release the cruise control lever.
The new speed is set.
Fine adjustment in 1 mph
(Canada: 1 km/h) increments
Faster
Briefly lift the cruise control lever in
direction of arrow1.
Slower
Briefly depress the cruise control lever
in direction of arrow2.Setting to last stored speed
(“Resume” function)
Briefly pull the cruise control lever in
direction of arrow4.
The cruise control resumes to the last
speed set.
Remove your foot from the accelerator
pedal.
iDepressing the accelerator pedal does not
deactivate the cruise control. After brief
acceleration (e.g. for passing), the cruise control
will resume the last speed set.
iWhen you use the cruise control lever to
decelerate, the transmission will automatically
downshift if the engine’s braking power does not
brake the vehicle sufficiently.
Warning!G
The speed stored in memory should only be
set again if prevailing road conditions per-
mit. Possible acceleration or deceleration
differences arising from returning to the
preset speed could cause an accident
and/or serious injury to you and others.
239 Controls in detail
Useful features
Rolling code programming
To train a garage door opener (or other
rolling code devices) with the rolling code
feature, follow these instructions after
completing the “Programming” portion
(steps 1 through 6) of this text. (A second
person may make the following training
procedures quicker and easier.)
Step 8:
Locate “training” button on the garage
door opener motor head unit.
Exact location and color of the button
may vary by garage door opener brand.
Depending on manufacturer, the
“training” button may also be referred
to as “learn” or “smart” button. If there
is difficulty locating the transmitting
button, refer to the garage door opener
Operator’s manual.Step 9:
Press the “training” button on the
garage door opener motor head unit.
The “training light” is activated.
You have 30 seconds to initiate the
following steps.
Step 10:
Return to the vehicle and firmly press,
hold for 2 seconds and release the
programmed signal transmitter button
(2,3,or4).
Step 11:
Press, hold for 2 seconds and release
same signal transmitter button a
second time to complete the training
process.Step 12:
Confirm the garage door operation by
pressing the programmed signal
transmitter button (2,3,or4).
Step 13:
To program the remaining two signal
transmitter buttons, repeat the steps
above starting with step 3.
Gate operator/Canadian programming
Canadian radio-frequency laws require
transmitter signals to “time-out” (or quit)
after several seconds of transmission
which may not be long enough for the
integrated signal transmitter to pick up the
signal during programming. Similar to this
Canadian law, some U.S. gate operators
are designed to “time-out” in the same
manner.
iSome garage door openers (or other rolling
code equipped devices) may require you to
press, hold for 2 seconds and release the same
signal transmitter button a third time to
complete the training process.
252 Operation
Driving instructions
Standing water
To prevent water from entering the
passenger compartment or the engine
compartment if you must drive through
standing water, keep in mind
the maximum depth of the water may
not exceed 19 in (48 cm)
you must drive slowly
For more information, see “Driving through
water” (
page 257).
Passenger compartment
!Do not drive through flooded areas or water
of unknown depth. Before driving through water,
determine its depth. Never accelerate before
driving into water. The bow wave could force
water into the engine and auxiliary equipment,
thus damaging them.
If you must drive through standing water, drive
slowly to prevent water from entering the
passenger compartment or the engine
compartment.Water in these areas could cause
damage to electrical components
wiring of the engine or transmission
or could result
in water being ingested by the engine
through the air intake, causing severe
internal engine damage.
Any such damage is not covered by the
Mercedes-Benz Limited Warranty.
Warning!G
Always fasten items being carried as
securely as possible.
In an accident, during hard braking or sud-
den maneuvers, loose items will be thrown
around inside the vehicle, and cause injury
to vehicle occupants unless the items are
securely fastened in the vehicle.
The rear cargo compartment is the preferred
place to carry objects. Always use cargo
tie-down rings, and if so equipped, always
use partition net* when transporting cargo.
The partition net* cannot secure hard or
heavy objects. Always fasten items being
carried as securely as possible using the
cargo tie-down rings in the cargo compart-
ment floor and fastening materials.
Do not load items on the roof. It may cause
instability during some maneuvers which
could result in an accident. This vehicle is
not intended to carry items on its roof. Thus
roof rails and roof mounted ski or bike
holders must not be used.
256 Operation
Driving instructions
Driving on embankments, slopes and
other steep inclines should only be
done straight uphill or downhill, i.e. in
the line of gravity. Maximum vehicle
climbing ability is a 80% grade which is
equivalent to a slope angle of approxi-
mately 38 degrees. Keep in mind that
the climbing ability of the vehicle
depends on terrain conditions.
Select gear range2 or1 on the auto-
matic transmission (
page 167).
Drive slowly.
Utilize the engine’s braking power
when descending a slope, observe the
engine speed (do not overrev the
engine). Apply the service brake as
needed.
Check the brakes after a lengthy
downgrade drive.Traction in steep terrain
Be easy on the accelerator and watch for
continuous wheel traction when driving
uphill.
iFor maximum engine speed, see “Instru-
ment cluster” (
page 26) and see “Engine”
(
page 415).
Warning!G
Never turn the vehicle around on steep
inclines. The vehicle might roll over. If the
vehicle cannot complete the attempted
climb, back it down in reverse gear.
iThe 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
away from the front 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
provided.
257 Operation
Driving instructions
Driving across a hilltop
Decelerate just ahead of a hilltop (do not
select gear rangeN), to prevent the
vehicle from speeding up too much after
climbing a hill.
Use the momentum of the vehicle to drive
across the hilltop.
After climbing a hill, driving in this manner
prevents the vehicle from:
loosing ground contact when cresting
hills
loosing its forward momentum
speeding up too much after climbing
the hillDriving downhill
Select gear range1 on the automatic
transmission (
page 167).
Drive downhill observing the same
rules as driving uphill (
page 255).Driving through water
1Fording depth, 19.6 in (50 cm)
Before driving through water,
determine its depth.
!Only apply the service brake if the vehicle is
travelling straight downhill, i.e. in the line of
gravity.
iThe special LOW RANGE – ABS setting
allows for precise and brief (cyclical) blocking of
the front wheels, permitting them to dig into
loose ground.
Remember that, when stopped, the front wheels
slide across a surface and thus lose their ability
to steer the vehicle.
!The water depth must not exceed 19.6 in
(50 cm). The ground under the water might not
be firm which could result the water being
deeper than expected when driving the vehicle
through it. Please note that the water level is
correspondingly lower for flowing water.
258 Operation
Driving instructions
Comply with the warnings
(
page 253) and rules for off-road
driving (
page 253).
Switch off the exterior lamps as well as
the climate control.
Select gear range2 or1 on the auto-
matic transmission (
page 167).
Enter and leave the water only at a
shallow spot, driving at walking speed.
Drive through the water slowly and at a
constant speed.
Do not stop vehicle while immersed in
water, and do not shut off the engine.
There is a very high level of driving
resistance in water. The surface is
slippery and may not be firm, making
pulling away in water difficult and
dangerous.
Make sure that only small bow waves
are formed when driving the vehicle
through water.
Clean mud off the tire tread after
driving 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.
!Do not open any of the vehicle’s doors while
driving through water. Water could otherwise en-
ter the vehicle interior and damage the vehicle’s
electronics, as well as the interior equipment.
!Obstacles can damage the vehicle
underbody or suspension components. If possi-
ble, use the assistance of a second person out-
side 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 distance away from the vehicle
and positioned so that he or she cannot get hurt
in case of any unexpected vehicle movement.
After off-road driving or crossing obstacles,
inspect vehicle for any damage, especially
vehicle underbody and suspension components.
Failure to do so can adversely affect the vehi-
cle’s future performance, including increased
chance of an accident.
259 Operation
Driving instructions
When driving over tree stumps, big rocks
and other obstacles, observe the following
rules:
Check the vehicle clearance before
crossing obstacles.
Comply with the warnings
(
page 253) and rules for off-road
driving (
page 253).
Select gear range1 on the automatic
transmission (
page 167).
Cross obstacles very slowly by aiming
one of the front wheels at the center of
the obstacle, and repeat same with the
rear wheel.Driving on sand
When driving on sand, observe the
following rules:
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
conditions permit. This helps overcome
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 you have suffi-
cient clearance.
Ruts
A number of off-road tracks or other
byways have deep ruts which can cause
the underbody to come in contact with the
ground.
!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 288) before continuing
your trip. Driving with reduced tire inflation
pressure increases the risk of losing control
of the vehicle and rolling over.
!Check that the ruts are not too deep and
your vehicle’s clearance is sufficient. Otherwise:
your vehicle may be damaged
the underbody of the vehicle may come in
contact with the ground and you may get
stuck
260 Operation
Driving instructions
Check the vehicle clearance before
driving in ruts.
Comply with the warnings
(
page 253) and rules for off-road
driving (
page 253).
Select gear range1 on the automatic
transmission (
page 167).
Drive slowly next to the ruts rather than
through them if at all possible.
If the ruts are too deep to drive in, drive
with one side of the vehicle on the
grassy center strip if the route permits.Returning from off-road drivingOff-road driving increases strain on the
vehicle.
We recommend that you inspect the vehi-
cle for possible damage after each off-road
trip. Recognizing any damage and a subse-
quent timely repair reduces the chance of
a possible breakdown or accident later on.
Proceed as follows:
Switch the transfer case in position
HIGH (
page 170).
Switch differential locks off
(
page 176).
Clean all exterior lamps and check
them for possible damage.
Clean the front and rear license plate.
Remove excessive dirt from tires,
wheels, wheel housings, and under-
body.
For instance, after driving in mud, clean
the radiator, chassis, engine, brakes,
and wheels from extreme dirt using a
strong jet of water.
After off-road driving or crossing obstacles,
inspect vehicle for any damage, especially
vehicle underbody and suspension components.
Failure to do so can adversely affect the vehi-
cle’s future performance, including increased
chance of an accident.
Warning!G
Never drive on pavement with activated
differential locks. Engaged front axle differ-
ential locks limits ability to move around
curves.
If you feel a sudden significant vibration or
ride disturbance, or you suspect that possi-
ble damage to your vehicle has occurred,
you should turn on the hazard warning flash-
ers, carefully slow down, and drive with cau-
tion to an area which is a safe distance from
the roadway.
Inspect the tires and under the vehicle for
possible damage. If the vehicle or tires
appear unsafe, have it towed to the nearest
Mercedes-Benz Light Truck Center or tire
dealer for repairs.
Damage to the vehicle may influence driving
comfort and poses the risk of accident to
you and other drivers.