power steering MERCEDES-BENZ ML320 1997 Complete Service Manual

74 Safety and SecurityOccupant safetyFor more information on power windows,
see the “Controls in detail” section
(page 144).Warning!
G
Activate the override switch when children
are riding in the back seats of the vehicle.
The children may otherwise injure them-
selves, e.g. by becoming trapped in the win-
dow opening.
When leaving the vehicle, always remove the
key from the steering lock, and lock the ve-
hicle. Do not leave children unattended in
the vehicle, or with access to an unlocked
vehicle. Unsupervised use of vehicle equip-
ment may cause an accident and / or seri-
ous personal injury.

122 Controls in detailAutomatic transmissionGear selector lever position
Effect
ì
Park position
Gear selector lever position
when the vehicle is parked. Place
gear selector lever in positionP
only when vehicle is stopped.
The park position is not intended
to serve as a brake when the
vehicle is parked. Rather, the
driver should always set the
parking brake in addition to
placing the gear selector lever in
positionP to secure the vehicle.
EffectThe key can only be removed
from the steering lock with the
gear selector lever in positionP.
With the key removed, the gear
selector lever is locked in
positionP.
If the vehicle’s electrical system
is malfunctioning, the gear
selector lever could remain
locked in positionP
(page 264).
í
Reverse gear
Place gear selector lever in
positionR only when vehicle is
stopped.
Effect
ë
Neutral
No power is transmitted from the
engine to the drive axle. When
the brakes are released, the
vehicle can be moved freely
(pushed or towed).
To avoid damage to the trans-
mission, never engageN while
driving.
If the ESP is deactivated or
malfunctioning:
Move gear selector lever toN
only if the vehicle is in danger of
skidding, e.g. on icy roads.
ê
Drive
The transmission shifts
automatically. All five forward
gears are available.

144 Controls in detailPower windows
Power windowsOpening and closing the side windows
The side windows can be opened and
closed electrically. The switches for all the
side windows are on the driver’s door. The
switches for the respective windows are
on the passenger door and on the rear cen-
ter console.
1Left front window
2Right front window
3Right rear window
4Left rear window
5Rear window override switch
(
page 73).
Additional switches for the rear windows
are located on the rear center console.6Left rear window
7Right rear window

Turn key in the steering lock to
position1 or2.
Warning!
G
When closing the windows, make sure that
there is no danger of anyone being harmed
by the closing procedure.
The closing of the door windows can be im-
mediately halted by releasing the switch or,
if switch was pressed past the resistance
point and released, by pressing the respec-
tive switch.
If the window encounters an obstruction
that blocks its path in a circumstance where
you pressed the switch past the resistance
point and released it to close the window,
the automatic reversal function will stop the
window and open it slightly.
If the window encounters an obstruction
that blocks its path in a circumstance where
you are closing the window by pressing the
switch and holding it there, the automatic
reversal function will not operate.
When leaving the vehicle, always remove the
key from the steering lock, and lock your ve-
hicle. Do not leave children unattended in
the vehicle, or with access to an unlocked
vehicle. Unsupervised use of vehicle equip-
ment can cause an accident and / or serious
personal injury.

146 Controls in detailPower windowsSynchronizing power windows
The power window must be resynchroni-
zed each time

after the battery has been discon-
nected.


if the power windows cannot be fully
opened (Express-open) or closed (Ex-
press-close).
Synchronizing the power windows

Switch on ignition.

Press the power window switches at
the symbolj until the side win-
dows are closed.
Hold the switches for approximately
one second.
The power window are synchronized.
Rear quarter windows*
The switches are on the upper part of the
center console.
1Left side
2Right side
Turn key in the steering lock to
position1 or2.Opening the windows

Press and hold the upper part of
switches1 or2.
The corresponding window will move
downwards until you release the
switch.Warning!
G
When closing the windows, make sure that
there is no danger of anyone being harmed
by the closing procedure. The closing of the
windows can be immediately halted by
releasing the switch.
When leaving the vehicle, always remove the
key from the steering lock, and lock the ve-
hicle. Do not leave children unattended in
the vehicle, or with access to an unlocked
vehicle. Unsupervised use of vehicle equip-
ment may cause an accident and / or seri-
ous personal injury.

149 Controls in detail
Sliding / pop-up roof*

Turn the key in the steering lock to
position1 or2 (
page 33).
Opening and closing the
sliding / pop-up roof

To open, close, raise or lower the
sliding / pop-up roof, move the switch
in the required direction1to4.
Release the switch when the roof has
reached the desired position.
Raising the roof

Press and hold the switch in
direction1.
The roof is raised at rear.
Lowering the roof

Pull and hold the switch in direction3.
The sliding / pop-up roof is lowered and
closed.Opening the sliding / pop-up roof auto-
matically

Briefly press switch in direction2.
The sliding / pop up roof will not open
completely.

Press switch again to open the
sliding / pop-up roof completely.
Stopping the roof

Briefly press the switch in any direc-
tion.
The movement of the roof will stop.
Synchronizing the sliding / pop-up roof
The power sliding / pop-up roof must be re-
synchronized each time after:

the battery has been disconnected


the sliding / pop-up roof has been
closed manually


the sliding / pop-up roof does not open
smoothly


a malfunction
Synchronizing

Remove the fuse from the fuse box
(page 287).

Replace the fuse in the fuse box.

Switch on ignition.

Press and hold the switch in
direction1 until the sliding / pop-up
roof is fully raised at the rear.
Hold the switch for approximately one
second.
The sliding / pop-up roof is synchro-
nized.

193 Operation
Driving instructions
Driving instructions
Drive sensibly – save fuel
Fuel consumption, to a great extent, de-
pends on driving habits and operating con-
ditions.
To save fuel you should:

Keep tires at the recommended infla-
tion pressures


Remove unnecessary loads


Allow engine to warm up under low
load use


Avoid frequent acceleration and decel-
eration


Have all maintenance work performed
at the intervals specified in the Service
Booklet and as required by the FSS.
Contact your authorized
Mercedes-Benz Light Truck Center
Fuel consumption is also increased by driv-
ing in cold weather, in stop-and-go traffic,
on short trips and in hilly country.
Drinking and driving
PedalsPower assistance
Warning!
G
Drinking and driving and / or taking drugs
and driving are a very dangerous combina-
tion. Even a small amount of alcohol or
drugs can affect your reflexes, perceptions
and judgement.
The possibility of a serious or even fatal ac-
cident are greatly increased when you drink
or take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or
taking drugs.
Warning!
G
Keep driver’s foot area clear at all times. Ob-
jects stored in this area may impair pedal
movement.Warning!
G
With the engine is not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle.

237 Operation
Vehicle care
Cleaning the Parktronic* system
sensors
1Parktronic system sensors
Use a mild car wash detergent, such as
Mercedes-Benz approved Car Sham-
poo, with plenty of water to clean the
sensors1.
When using a steam cleaner or power
washer, aim nozzle only briefly from a min-
imum distance of 4 in (10 cm) at
sensors1.To prevent scratches, never apply strong
force and use only a soft, non-scratchy
cloth when cleaning the sensor. Do not
attempt to wipe dirty sensors with a dry
cloth or sponge.
Wiper blades

Fold wiper arm forward.

Clean the wiper blade inserts with a
clean cloth and detergent solution.Window cleaning

Fold wiper arms forward.

Use a window cleaning solution on all
glass surfaces. An automotive glass
cleaner is recommended.
An automotive glass cleaner is recom-
mended.
Warning!
G
For safety reasons, switch off wipers and re-
move key from steering lock before cleaning
the wiper blades, otherwise the wiper motor
might suddenly turn on and cause injury.
!Fold the windshield wiper arms back
onto the windshield before turning the
key in the steering lock.
Hold on to the wiper when folding the
wiper arm back. If released, the force
of the impact from the tensioning
spring could crack the windshield.Warning!
G
For safety reasons, switch off wipers and re-
move key from steering lock before cleaning
the wiper blades, otherwise the wiper motor
might suddenly turn on and cause injury.

283 Practical hints
Towing the vehicle
Towing the vehicle
Mercedes-Benz recommends that the vehi-
cle be transported with all wheels off the
ground using flatbed or appropriate wheel
lift / dolly equipment. This method is pref-
erable to other types of towing.When circumstances do not permit the
recommended towing methods, the vehi-
cle may be towed with all wheels on the
ground only so far as necessary to have the
vehicle moved to a safe location where the
recommended towing methods can be em-
ployed.
!Use flatbed or wheel lift / dolly equip-
ment, with key in steering lock turned
to position0.
Do not tow with sling-type equipment.
Towing with sling-type equipment over
bumpy roads will damage radiator and
supports.
To prevent damage during transport,
do not tie down vehicle by its chassis or
suspension parts. Use the towing eyes.
Switch off the ESP (
page 81),
tow-away alarm (
page 85) and the
automatic central locking (
page 93).
!When towing the vehicle with all wheels
on the ground, the gear selector lever
must be in positionN and the key must
be in steering lock position2.
When towing the vehicle with all wheels
on the ground, the vehicle may be
towed only for distances up to 30 miles
(50 km) and at a speed not to exceed
30 mph (50 km / h).
If the vehicle is towed with the front
axle raised (observe instructions re-
garding flexible drive shaft), the engine
must be shut off (key in steering lock
position1). Otherwise, the 4-ETS may
become engaged which may cause loss
of towing control.
!To be certain to avoid additional dam-
age to the vehicle powertrain, however
you should observe the following:

With damage to the front axle

raise front axle


remove flexible drive shaft be-
tween rear axle and transfer
case


With damage to the rear axle

raise rear axle


tow vehicle with wheel lift or
dolly placed under front wheels


With damage to the transfer case

remove flexible drive shaft to
the drive axles
Always install new self-locking nuts
when reinstalling flexible drive shaft.

284 Practical hintsTowing the vehicleWarning!
G
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:

the engine will not run


there is a malfunction in the power sup-
ply or in the vehicle’s electrical system
Prior to towing the vehicle with all wheels on
the ground, make certain that the key is in
steering lock position2.
If the key is left in steering lock position0
for an extended period of time, it can no
longer be turned in the switch. In this case,
the steering is locked. To unlock, remove
key from steering lock and reinsert.
Warning!
G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle. Adapt your driving accordingly.iTo signal turns while being towed with
hazard warning flasher in use, turn key
in steering lock to position2 and acti-
vate combination switch for left or right
turn signal in usual manner – only the
selected turn signal will operate.
Upon canceling the turn signal, the haz-
ard warning flasher will operate again.iThe vehicle cannot be started via
tow-start.
!When towing the vehicle with all wheels
on the ground, note the following:
With the automatic central locking acti-
vated and the key in steering lock
position2, the vehicle doors lock if the
left front wheel is turning at vehicle
speeds of approx. 9 mph (15 km / h) or
more.
To prevent the vehicle doors from lock-
ing, deactivate the automatic central
locking (
page 93).
Towing of the vehicle should only be
done using the towing eye. Never at-
tach tow cable, tow rope or tow rod to
vehicle chassis, frame or suspension
parts.

293 Technical data
Layout of poly-V-belt drive
Layout of poly-V-belt drive
1Automatic belt tensioner
2Power steering pump
3Air conditioning compressor
4Crankshaft
5Coolant pump
6Generator (alternator)
7Idler pulley