check engine MERCEDES-BENZ ML320 2003 W163 Owner's Manual

Contents
Loading.............................................. 139
Loading instructions..................... 139
Partition net* ............................... 141
Cargo area cover blind* ............... 143
Cargo floor plates ........................ 144
Roof rack*.................................... 145
Driving systems ................................. 146
Cruise control .............................. 146
Parktronic system*
(Parking assist) ............................ 149
Useful features .................................. 152
Interior storage spaces ................ 152
Cup holders.................................. 154
Armrest in rear seat bench .......... 155
Ashtrays and cigarette lighter ...... 156
Electrical outlet ............................ 158
Telephone* .................................. 158
Tele Aid* ...................................... 159
Garage door opener ..................... 168
Trip computer*............................. 172Operation......................................... 177
The first 1000 miles (1500 km) ......... 178
Driving instructions............................ 179
Drive sensibly – save fuel............. 179Drinking and driving ...................... 179
Pedals ........................................... 179
Power assistance .......................... 179
Brakes........................................... 180
Driving off ..................................... 181
Parking.......................................... 182
Tires .............................................. 182
Hydroplaning................................. 183
Tire traction .................................. 183
Tire speed rating ........................... 184
Winter driving instructions ............ 184
Standing water.............................. 185
Off-road driving ............................. 186
Trailer towing ................................ 192
Passenger compartment ............... 196
Driving abroad .............................. 197
Control and operation of radio
transmitters .................................. 197
Catalytic converter........................ 198
Emission control ........................... 198
Coolant temperature..................... 199
At the gas station ............................... 200
Check regularly and
before a long trip .......................... 201Engine compartment .......................... 202
Hood ............................................. 202
Engine oil ...................................... 203
Transmission fluid level ................ 206
Coolant ......................................... 206
Battery .......................................... 207
Windshield washer system and
headlamp cleaning system ........... 208
Tires and wheels ................................ 209
Important guidelines ..................... 209
Life of tire ..................................... 210
Direction of rotation ..................... 210
Checking tire inflation pressure .... 211
Rotating wheels ............................ 212
Winter driving ..................................... 213
Winter tires ................................... 213
Block heater (Canada only) ........... 214
Snow chains ................................. 214
Maintenance ...................................... 215
Clearing the service indicator ....... 215
Service term exceeded ................. 215
Calling up the service indicator .... 216
Resetting the service indicator ..... 216
Vehicle care ....................................... 217
Cleaning and care
of the vehicle ................................ 217

38 Getting startedAdjusting
Move lever1 to its stop down.

Move steering wheel up or down to de-
sired position.

Move lever1 to its stop up.
The steering column is locked.
Mirrors
Adjust the inside and exterior rear view
mirrors before driving so that you have a
good view of the road and traffic condi-
tions.Inside rear view mirror

Manually adjust the inside rear view
mirror.
Exterior rear view mirrors
!If the indicator lamp
_
(page 26)
comes on while the engine is running,
the steering column is not locked prop-
erly.
Warning!
G
In the case of an accident, liquid electrolyte
may escape the mirror housing if the mirror
glass breaks.
Electrolyte has an irritating effect. Do not al-
low the liquid to come into contact with
eyes, skin, clothing, or the respiratory sys-
tem. In case it does, immediately flush af-
fected area with water, and seek medical
help if necessary.
Warning!
G
Exercise care when using the passenger
side exterior rear view mirror. The mirror
surface is convex (outwardly curved surface
for a wider field of view). Objects in mirror
are closer than they appear. Check your in-
side rear view mirror or glance over your
shoulder before changing lanes.!Electrolyte drops coming into contact
with the vehicle paint finish can only be
completely removed while in their liq-
uid state and by applying plenty of wa-
ter.

49 Getting started
Driving
Problems while driving
The engine runs erratically and misfires

An ignition cable may be damaged.


The engine electronics may not be op-
erating properly.


Unburned gasoline may have entered
the catalytic converter and damaged it.

Give very little gas.

Have the problem repaired by an au-
thorized Mercedes-Benz Center as
soon as possible.The coolant temperature is over 248°F
(120°C)
The coolant is too hot and is no longer
cooling the engine.

Stop the vehicle as soon as possible
and turn off the engine. Allow engine
and coolant to cool.

Check the coolant level and add cool-
ant if necessary (
page 206).In case of accident
If the vehicle is leaking gasoline:

Do not start the engine under any cir-
cumstances.

Notify local fire and/or police authori-
ties.
If the extent of the damage cannot be de-
termined:

Notify an authorized Mercedes-Benz
Center.
If no damage can be determined on the


major assemblies


fuel system


engine mount:

Start the engine in the usual manner.

54 Safety and SecurityOccupant safety
Occupant safetyIn this section you will learn the most im-
portant facts about the restraint systems
of the vehicle.
The restraint systems are

Seat belts


Emergency tensioning device


Airbags


Child seats


Child seat recognition


Lower anchors and tethers for children
(LATCH)
As independent systems their protective
effects work in conjunction with each oth-
er.The warning lamp
1
in the instrument
cluster (
page 26) lights up for about
4 seconds when the key is turned to
position2. It goes out when you start the
engine. This shows that the restraint sys-
tems are operational.
If the lamp does not come on at all or if it
fails to extinguish after approximately
4 seconds or if it comes on thereafter, a
malfunction in the system has been de-
tected.
More information can be found in the
“Practical hints” section (
page 227).
iFor information on infants and children
traveling with you in the vehicle and re-
straint systems for infants and chil-
dren, see “Children in the vehicle”
(page 63).
Warning!
G
In the event that the SRS malfunction indica-
tor lamp lights up during driving or does not
come at all, the SRS may not be operational.
For your safety, we strongly recommend
that you visit an authorized Mercedes-Benz
Light Truck Center immediately to have the
system checked; otherwise the SRS may not
be activated when needed in an accident,
which could result in serious or fatal injury,
or it might deploy unexpectedly and unnec-
essarily which could also result in injury.
Improper work on the restraint systems can
lead to unintentional deployment or opera-
tional failure.
All work on these systems should therefore
only be carried out by an authorized
Mercedes-Benz Light Truck Center.

117 Controls in detail
Automatic transmission
Accelerator position
Your driving style influences the transmis-
sion’s shifting behavior:
Less throttle Earlier upshifting
More throttle Later upshifting
Kickdown
Use kickdown when you want maximum
acceleration
Press the accelerator past the point of
resistance.
The transmission shifts into a lower
gear.

Ease on the accelerator when you have
reached the desired speed.
The transmission shifts up again.

Towing a trailer
If you tow a trailer, note the following
points:

Manually shift to a lower gear range
(4,3, 2, 1), if the transmission hunts
between gears on inclines
(page 114).
A lower gear range and reduction of
speed reduces the change to overload
or overheat the engine.


At very steep inclines switch transfer
case to LOW RANGE mode
(page 118).
For more information on trailer towing, see
the “Operation” section (
page 192).Emergency operation (Limp Home
Mode)
If the vehicle acceleration worsens or the
transmission no longer shifts, the trans-
mission is most likely operating in limp
home mode. In this mode only 2nd gear
and reverse gear can be activated.
Stop the vehicle.

Move selector lever to positionP.

Turn off the engine.

Wait at least ten seconds before re-
starting.

Move selector lever to position D (for
2nd gear) or R.

Have the transmission checked at an
authorized Mercedes-Benz Light Truck
Center as soon as possible.

130 Controls in detailAutomatic climate controlActivating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press button
°
again.
The indicator lamp on the button
°

goes out.
The air conditioning system uses the refrig-
erant R134A. This refrigerant is free of
CFCs which are harmful to the ozone layer.
Residual heat and ventilation
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.
Activating
Turn the key in the steering lock to
position1.

Press button
°
(page 125).
The indicator lamp on button
°

comes on.Deactivating

Press button
°
.
The indicator lamp on button
°

goes out.
!If the
°
button on the automatic cli-
mate control panel starts to blink, this
indicates that the air conditioning sys-
tem is losing refrigerant. The compres-
sor has turned itself off. The air
conditioning cannot be turned on
again.
Have the air conditioning system
checked at the nearest authorized
Mercedes-Benz Light Truck Center.
iHow long the system will provide heat-
ing depends on the coolant tempera-
ture and the temperature set in the
climate control. The blower will run at
lower speed regardless of the air vol-
ume control setting.
iThe residual heat is automatically
turned off:

when the ignition is switched on


after about 30 minutes


if the coolant temperature is too
low


if the battery voltage drops

187 Operation
Driving instructions
Checklist before off-road driving
Tires

Check the tread depth and maintain
specified tire pressure (see tire pres-
sure label inside the fuel filler flap).


Check tires for possible damage and
remove foreign objects.


Replace missing valve caps.
Rims


Dented or bent rims can cause tire
pressure loss and damage the tire
beads. For this reason, check and, if
necessary, change rims before driving
off-road.Vehicle tool kit


Check if the vehicle jack is functional.


In all cases take the vehicle tool kit, a
strong tow rope, a shovel and a small
plank (to put under the vehicle jack on
sandy soil) with you.
Driving in steep terrain
Slope angle125° (ML 320, ML 350, ML 500)
21° (ML 55 AMG)
226°(ML 320, ML 350, ML 500)
23° (ML 55 AMG)
!Observe the following during off-road
driving:

Adjust vehicle speed to condition of
terrain. The more uneven, rutty and
steeper the terrain, the lower the
speed should be


Watch out for obstacles, such as
rocks, holes, tree stumps and ruts.


Be especially careful when driving
in unknown territory. It may be nec-
essary to get out of the vehicle and
scout the path you intend to take.


Continuous and speedy driving in
sandy soil overcomes the vehicle
rolling resistance, and helps to pre-
vent the vehicle from sinking into
the ground.


Do not initiate jumps with the vehi-
cle. It interrupts the forward mo-
mentum of the vehicle.


Always drive onto slopes with the
the engine running and the vehicle
in gear.

188 OperationDriving instructions

Switch to LOW RANGE mode before
starting to drive up or down steep in-
clines (
page 118).


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 60% grade.


Do not drive along the side of a slope
(danger of vehicle rollover). If in doing
so, the vehicle begins to show a ten-
dency to roll, immediately steer into a
line of gravity (straight up or downhill).


To help avoid the vehicle rolling over,
never turn it around on steep inclines.
If the vehicle cannot complete the at-
tempted climb, back it down in reverse
gear.


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


Be easy on the accelerator and watch
for continuous wheel traction when
driving in steep terrain.
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 away 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 increased.Driving across a hilltop


Decelerate just ahead of a hilltop (do
not select gear rangeN), to prevent the
vehicle from speeding up too much af-
ter climbing a hill.
Use the momentum of the vehicle to
drive across the hilltop.
Driving in this manner prevents the ve-
hicle from jumping across the hilltop
and thus loosing its forward momen-
tum.
iAvoid excessive engine speeds – drive
with moderate engine speeds
(max. 3000 RPM).
Select gear range2 or1 on the auto-
matic transmission (
page 114).

191 Operation
Driving instructions
Returning from off-road drivingOff-road driving increases strain on the ve-
hicle.
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 off the LOW RANGE mode
(page 118).


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.


Inspect frame, oil pan, brake hoses,
etc., as well as vehicle underbody for
possible damage.


Check tires for possible damage, clean
all exterior lamps, and conduct a brake
test.


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.
Warning!
G
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 ap-
pear unsafe, have it towed to the nearest
Mercedes-Benz Light Truck Center or tire
dealer for repairs.

195 Operation
Driving instructions
Adjust the mirrors 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 be 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 be sure that 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.
I t i s m o r e p r o n e t o r e a c t i n g t o s i d e w i n d
gusts, and requires more sensitive
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 hunts between
gears on inclines, manually shift to a
lower gear (select 4, 3, 2 or 1).
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 selector lever in position1, switch
transfer case to LOW RANGE mode
(page 118).


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 trailer should begin to sway, re-
duce the vehicle’s speed and use the
brake controller by hand to straighten
out the vehicle and trailer.
In no case should you attempt to
straighten out the tow vehicle and trail-
er by increasing the speed or over-
steering and stepping on the brakes.