Mercedes-Benz ML320. Service manual - part 78

 

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Mercedes-Benz ML320. Service manual - part 78

 

 

139

Controls in detail

Automatic climate control

Activating

Press button

Ä (

page 135).

The indicator lamp on the button 
comes on.

Deactivating

Press button

Ä (

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.

i

To achieve the fastest possible cooling 
of the interior, the automatic climate 
control automatically switches to air 
recirculation. The indicator lamp in the 
button

Ä is not illuminated when 

the system automatically switches to 
air recirculation.

i

The 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)

i

Condensation may drip out from under-
neath the vehicle. This is normal and 
not an indication of a malfunction.

140

Controls in detail

Automatic 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 
position or 1 (

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.

i

How 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.

i

The 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. 

1 Air volume control
2 Air distribution control
3 Automatic control (air distribution, air 

volume)

Press button

U.

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 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.

i

When 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.

컄컄

142

Controls in detail

Automatic climate control

Adjusting air distribution

Press upper part of button

Ô.

Air is directed upwards.

Press lower part of button

Ó.

Air is directed to the footwell.

Front and rear air vents

Adjusting side air vents

Turn thumbwheel 4 (

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.

i

For 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

Ventilation of side 
windows in area of 
exterior mirror

M

Closed

컄컄

 

 

 

 

 

 

 

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