2003 MERCEDES-BENZ ML320 light

122 Controls in detailGood visibilityWindshield wipers
Information on the windshield wipers
(page 47) is found in the “Getting start-
ed” section. Intermittent wiping
Windshield wipers without rain sensor
At speeds of approximately 105 mph
(170 km/h) the wiper switches automati-
cally to continuous wiping. Always obey lo-
cal speed limits.
Windshield wipers with rain sensor*
The rain sensor controls the windshield
wipers automatically according to the
amount of water on the windshield.

Switch ignition on.

Set the wiper switch to position1
(page 47).
One initial wipe, pauses between wipes
are automatically controlled by the rain
sensor monitoring wetness of wind-
shield.
!If leaves, snow, etc. block the wind-
shield wipers, the wiper motor turns
off.

For safety reasons, withdraw key
from steering lock. Remove block-
age.


Turn the windshield wipers on
again.
If windshield wipers fail to function at
all in switch position1,


set the wiper switch to the next
highest wiper speed.


have the windshield wipers
checked at the nearest authorized
Mercedes-Benz Light Truck Center.
iIntermittent wiping is interrupted when
the vehicle is at standstill and a front
door is opened.
!To prevent damage of the windshield
wipers, do not leave the wiper switch in
intermittent setting, when the vehicle
is taken to an automatic car wash or
when cleaning the windshield.
The switch should not be left in inter-
mittent setting as the wipers will wipe
the windshield once every time the en-
gine is started. Dust that accumulates
on the windshield might scratch the
glass when wiping occurs on a dry
windshield!iWhen intermittent wiping is on and the
key is turned from position1 to
position2 in the steering lock
(page 33), and kept in that position
for longer than 2 seconds, the wipe in-
terval will be set to approximately
5seconds.

123 Controls in detail
Good visibility
Rear window wiper
The rear window wiper will also automati-
cally engage if the windshield wiper is en-
gaged and the gear selector lever is placed
in reverse.
Rear window wiper with rain sensor*
Rear window wiper intervals are controlled
automatically according to the amount of
water on the windshield and the speed of
the vehicle, if:

rear window wiper is switched on


front windshield wipers are switched to
intermittent wiping
The interval for the rear window wiper re-
mains constant when the windshield wiper
interval is ten seconds or more.
Sun visor
The sun visors protect you from sun glare
while driving.
1Mirror cover
2Mounting

Swing sun visors down when you expe-
rience glare.

To use mirror, lift cover1 up.
Illuminated vanity mirrors

Turn the key in steering lock to
position1 (
page 33).

Lift cover up.
The lamp switches on.
Warning!
G
Do not use the vanity mirror while driving.
Keep the mirrors in the sun visors closed
while vehicle is in motion. Reflected glare
can endanger you and others.
iIf sunlight enters through a side win-
dow, disengage sun visor from
mounting2 and pivot to the side.

126 Controls in detailAutomatic climate controlThe automatic climate control is operation-
al whenever the engine is running. You can
operate the climate control system in ei-
ther the automatic or manual mode. The
system cools or heats the interior depend-
ing on the selected interior temperature
and the current outside temperature.
Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.
Automatic mode
Switching on
Briefly press button
U

(
page 125).
The indicator lamp lights up. The tem-
perature, air volume and distribution
are controlled automatically.

Adjust the temperature with the tem-
perature control4 (
page 125).
Temperature control is switched off in
the extreme position (blue or red dot).
Warning!
G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.
iSevere conditions (e.g. strong air pollu-
tion) may require replacement of the fil-
ter before its scheduled interval. A
clogged filter will reduce the air volume
to the interior.
If the vehicle interior is hot, ventilate
the interior before driving off.
Keep the air intake grille in front of the
windshield free of snow and debris.
Do not touch the interior temperature
sensor to maintain a precise tempera-
ture.
The set value is indicated by a lighted
segment on the control wheels.

128 Controls in detailAutomatic climate controlAdjusting air distribution
Turn air distribution control8
(page 125) to one the following sym-
bols:
Windshield fogged on the outside

Switch the windshield wipers on.

Turn air distribution control8 to
h

or
k
.
Defrosting
Activating
Press button
P
(page 125).
The indicator lamp on the button lights
up.
Deactivating

Press button
P
again.
or

Press button
U
(page 125).
The indicator lamp on the button lights
up.
The indicator lamp on the button lights up.
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 outlets
j
Directs air to the wind-
shield and side air outlets
V
Directs air into the entire
vehicle interior
k
Directs air to the foot-
wells and side air outlets
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.

129 Controls in detail
Automatic climate control
Activating
Press button
O
(page 125).
The indicator lamp on the button lights
up.
Deactivating

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

lights up.
iTo achieve the fastest possible cooling
of the interior, the automatic climate
control automatically switches to air
recirculation. The indicator lamp in the
button
O
is not illuminated when
the system automatically switches to
air recirculation.
iThe air recirculation mode is activated
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.

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

131 Controls in detail
Automatic climate control
Rear window defroster
The rear window defroster uses a large
amount of power. To keep the battery
drain to a minimum, switch off the defrost-
er as soon as the rear window is clear. The
defroster is automatically deactivated af-
ter approximately 6 to 17 minutes of oper-
ation depending on the outside
temperature.
Activating
Switch ignition on.

Press button
F
(page 125).
The indicator lamp on the button lights
up.
Deactivating

Press button
F
again.
The indicator lamp on the button goes
out.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 125).
The indicator lamp on the button lights
up.
The operation of the rear automatic cli-
mate 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.
Warning!
G
Any accumulation of snow and ice should be
removed from the rear window before driv-
ing. Visibility could otherwise be impaired,
endangering you and others.!If the rear window defroster switches
off too soon and the indicator lamp
starts blinking, this means that too
many electrical consumers are operat-
ing simultaneously and there is insuffi-
cient voltage in the battery. The system
responds automatically by deactivating
the rear window defroster.
As soon as the battery has sufficient
voltage, the rear window defroster au-
tomatically turns itself back on.

132 Controls in detailAutomatic climate controlAutomatic 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 button
U
.
The indicator lamp on the button lights
up.
The automatic climate control cools or
heats the interior depending on the
temperature selected on the front cli-
mate control unit.Adjusting air volume and air distribu-
tion manually
Adjusting air volume

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

Press lower part of button
R
.
The blower setting is decreased each
time the button is pressed.Adjusting air distribution

Press
Ô
, upper part of button2.
Air is directed upwards.

Press
Ó
, lower part of button2.
Air is directed to the footwell.
Front and rear air outlets
iWhen the air volume or air distribution
control is pressed, the automatic mode
is switched off. The indicator lamp in
button
U
is turned off. Temperature
setting remains in automatic mode.
iFor draft-free ventilation, adjust the air
outlets upwards
To allow unrestricted operation of the
automatic climate control, the air out-
lets should remain open.