MERCEDES-BENZ ML430 1997 Complete Repair Manual

137 Controls in detail
Automatic climate control
Automatic mode
Switching on
Briefly press buttonU
(page 135).
The indicator lamp comes on. The tem-
perature, air volume and distribution
are controlled automatically.

Adjust the temperature with the tem-
perature control4 (
page 135).
Temperature control is switched off in
the extreme position (blue or red dot).
Switching off

Briefly press buttonU
(page 135).
The indicator lamp goes out. The auto-
matic mode is switched off.
Air volume control1 is set to fan
speed 2 and air distribution is set
toV.Activating basic setting

Press buttonU at least
three seconds.
All functions are switched to automatic
mode and temperature is set to 72°F
(22°C).
Changing basic setting

Set temperature control4
(page 135) to desired temperature.

Press buttonU for ten seconds.
The selected temperature value is
stored and set.Adjusting air volume and air distribu-
tion manually
Adjusting air volume
Turn air volume control1 to one of
five air volume settings.
iAdjust temperature settings in small
increments.
iIf you turn air volume control1 or air
distribution control8 (
page 135),
the automatic mode switches off. The
indicator lamp in the buttonU goes
out. The temperature control will still
be in automatic mode.
iWhen set to 0 the system is fully deac-
tivated and no fresh air is supplied. This
setting should only be selected for
short periods of time.

138 Controls in detailAutomatic climate controlAdjusting air distribution
Turn air distribution control8
(page 135) to one the following
symbols:
Windshield fogged on the outside

Switch the windshield wipers on,
(page 50).

Turn air distribution control8 toh
ork.
Defrosting
Activating
Press buttonP (
page 135).
The indicator lamp on the button
comes on.
Deactivating

Press buttonP again.
or

Press buttonU (
page 135).
The indicator lamp on the buttonP
goes out.
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside. This setting cuts off the
intake of outside air and recirculates the
air in the passenger compartment.
Symbol
Function
h
Directs air to the center
and side air vents
j
Directs air to the wind-
shield and side air vents
V
Directs air into the en-
tire vehicle interior
k
Directs air to the foot-
wells and side air vents
iThese settings should only be selected
for a short time.
When the defrost setting has been se-
lected, only the rear window defroster
can be switched on. No other settings
are possible.
Warning!
G
When the outside temperature is below
41°F (5°C), only switch to air recirculation
mode for short periods to prevent window
fogging.

139 Controls in detail
Automatic climate control
Activating
Press buttonÄ (
page 135).
The indicator lamp on the button
comes on.
Deactivating

Press buttonÄ (
page 135).
The indicator lamp on the button goes
out.
Air conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the automatic
climate control system. The air in the vehi-
cle will then no longer be cooled or dehu-
midified.

Press button° (
page 135).
The indicator lamp on the button°
comes on.
Activating
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 R-134a. This refrigerant is free of
CFCs which are harmful to the ozone layer.
iTo achieve the fastest possible cooling
of the interior, the automatic climate
control automatically switches to air
recirculation. The indicator lamp in the
buttonÄ is not illuminated when
the system automatically switches to
air recirculation.
iThe air recirculation mode is
deactivated automatically

after 30 minutes if the automatic
climate control is switched on


after five minutes if the air condi-
tioning is switched off


after five minutes if the outside
temperature is above approximate-
ly 45°F (7 °C)
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.

140 Controls in detailAutomatic climate control
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
position0 or1 (
page 33).

Press button° (
page 135).
The indicator lamp on button°
comes on.Deactivating

Press button°.
The indicator lamp on button°
goes out.
!If the °button on the automatic
climate control panel starts to flash,
this indicates that the air conditioning
system is losing refrigerant. The com-
pressor 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

141 Controls in detail
Automatic climate control
Rear passenger compartment ventila-tion and rear automatic climate control
Deactivating
For an improved cooling or heating output
in the front passenger compartment, you
can switch off the rear passenger compart-
ment ventilation.
Press button§ (
page 135).
The indicator lamp on the button
comes on.
The operation of the rear automatic
climate control and the fresh air supply
to the rear compartment is shut off.
Activating

Press button§ again.
The indicator lamp on the button goes
out.
The rear automatic climate control
switches to automatic mode and fresh
air enters the rear compartment.Automatic mode
The automatic climate control panel for the
rear is located on the rear center console.
1Air volume control
2Air distribution control
3Automatic control (air distribution, air
volume)

Press buttonU.
The indicator lamp on the button
comes on.
The automatic climate control cools or
heats the interior depending on the
temperature selected on the front
climate control unit.Adjusting air volume and air distribu-
tion manually
Adjusting air volume

Press upper part of buttonR.
The blower setting is increased each
time the button is pressed.

Press lower part of buttonR.
The blower setting is decreased each
time the button is pressed.iWhen the air volume or air distribution
control is pressed, the automatic mode
is switched off. The indicator lamp in
buttonU is turned off. Temperature
setting remains in automatic mode.


142 Controls in detailAutomatic climate control
Adjusting air distribution
Press upper part of buttonÔ.
Air is directed upwards.

Press lower part of buttonÓ.
Air is directed to the footwell.
Front and rear air ventsAdjusting side air vents

Turn thumbwheel4 (
page 135) to
one of the following positions:
!When in manual mode, the rear blower
setting cannot be increased beyond
the setting for the front blower setting.
For example, if the driver or front pas-
senger changes the blower setting to
level 3, the rear blower will not go high-
er than level 3 as well.
iFor draft-free ventilation, adjust the air
vents upwards.
To allow unrestricted operation of the
automatic climate control, the air vents
should remain open.
Symbol
Function
h
Open
l
Ventilation of side
windows in area of
exterior mirror
M
Closed


143 Controls in detail
Automatic climate control
Center air vents
Opening 
Turn thumbwheel for center air vent1
(page 135) upward to positionh.
Closing

Turn thumbwheel for center air vent1
downward to positionM.
Use the left thumbwheel to adjust the cen-
ter air vents on the left and in the center.
Use the right thumbwheel to adjust the
right center air vent.Rear passenger compartment air vents
1Left center air vent, adjustable
2 Right center air vent, adjustable
iThe temperature at the air vents for the
rear passenger compartment is the
same as at the dashboard center air
vents.

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.

145 Controls in detail
Power windows
Opening the windows
Press switch1 to4 at the
symbolk to the resistance point.
The corresponding window will move
downwards until you release the
switch.
Closing the windows

Press switch1 to 4 at the
symbolj to the resistance point.
The corresponding window will move
upwards until you release the switch.Fully opening the windows
(Express-open)

Press switch1 to4 at the
symbolk past the resistance point
and release.
The corresponding window opens com-
pletely.
Fully closing the windows
(Express-close)

Press switch1 to4 at symbolj
past the resistance point and release.
The corresponding window closes com-
pletely.
Stopping windows

Press respective switch again.
Warning
G
If you pull and hold the switch up when clos-
ing the window, and upward movement of
the window is blocked by some obstruction
including but not limited to arms, hands, fin-
gers, etc., the automatic reversal will not op-
erate.
!If the upward movement of the window
is blocked during the closing proce-
dure, the window will stop and open
slightly.
Remove the obstruction, press the
switchj again past the resistance
point and release.
If the window still does not close when
there is no obstruction, then hold the
switchj down. The side window
will then close without the obstruction
sensor function.Warning!
G
Driver’s door only:
If within five seconds switch j is again
pressed past the resistance point and
released, the automatic reversal will not
operate.

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.