2002 MERCEDES-BENZ ML320 Climate controls

112 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Basic setting - automatic mode
To a c ti va te :
With the engine running, briefly press the Ubutton.
The indicator lamp in the Ubutton lights up. The
temperature, air volume and distribution are controlled
automatically.
Temperature can be adjusted with the temperature
control, which is located in the center.
Turning the control wheel to either the blue or red dot
switches off the temperature regulation.
To deactivate:
Briefly press the Ubutton. The indicator lamp in the
Ubutton goes out. The automatic mode is switched
off, air volume control is set to fan speed 2 and air
distribution is set to positionV.To activate basic setting:
Press Ubutton at least 3 seconds.
All functions are switched to automatic mode and
temperature is set to 72˚F (22˚C).
The rear window defroster may be switched on
manually.
P83.30-3551-21

113 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Programming the basic temperature setting
Set temperature control to the desired temperature.
Press the Ubutton for 10 seconds.
The new temperature value is selected and set.Note:
Make the temperature settings in small increments.
P83.30-3552-21

114 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Special settings (use only for short duration)
Turning the air volume control wheel or air distribution
wheel switches off the automatic mode.
The temperature control will be still in automatic mode.
The fan speed and air distribution can be manually
selected.
The indicator lamp in the Ubutton goes out.
The set value is indicated by a lighted segment on the
setting wheels.
To return to automatic mode:
Press Ubutton. The indicator lamp in the button
illuminates and the lighted segments on the air volume
and air distribution wheel go out.Air volume, manual:
The air volume control wheel has 5 fan speeds which
can be selected.
Important!
No fresh air enters the interior with the air volume
control set to0. The system is switched off.
Air distribution, manual:
jAir from the windshield and side air outlets.
VAir from the windshield, center, side and footwell
air outlets.
kAir from the footwell and side air outlets.
hAir from the center and side air outlets.
P83.30-3549-21

115 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Defrosting / Windows fogged up on the inside
To a c ti va te :
Press the Pbutton. The indicator lamp in the button
illuminates.
The automatic climate control switches automatically to:
•maximum heat and blower output
•air from the side and windshield air outlets
•Rear passenger ventilation is switched off.
To deactivate:
Press Pbutton again or Ubutton. The indicator
lamp in button goes out and the system returns to the
previous setting.
Note:
If the automatic climate control is in the defrost mode,
the rear window defroster may still be switched on
manually. No other settings are possible.Windshield fogged up on outside.
Switch on the windshield wiper.
Set air distribution wheel to positionj.

116 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Air recirculation
This mode can be selected to temporarily reduce the
entry of annoying odors or dust into the vehicle’s
interior.
Outside air is not supplied to the vehicles’s interior.
To select, press briefly O button. The indicator lamp
in button lights up.
To cancel, press briefly O button again. The indicator
lamp in button goes out.
The system automatically switches from air
recirculation to fresh air, after:
•approx. 30 minutes, when the automatic climate
control switched on,
•approx. 5 minutes, when the automatic climate
control switched off.
•approx. 5 minutes, if the outside temperature is
below 45˚F (7˚C).
If the windows should fog up from the inside, switch
from recirculated air back to fresh air.Note:
To achieve the fastest possible cooling of the interior, the
automatic climate control automatically switches to air
recirculation.
The indicator lamp in the Obutton is not illuminated
when the system automatically switches to air
recirculation.

117 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Economy mode
The function of this setting corresponds to the
automatic mode. However, because the air conditioning
compressor will not engage (fuel savings), it is not
possible to air condition in this setting.
Press AC
OFF
button to activate. The indicator lamp in the
button illuminates.
Press AC
OFF
button once again to return to the previous
setting.
Important!
In the mode AC
OFF
the windows could fog up on the
inside. Switch off ACOFF
mode.Residual engine heat utilization
With the engine switched off, it is possible to continue
to heat or ventilate the interior for a short while,
dependent of the temperature set in the climate control.
Air volume and distribution are controlled
automatically.
To s e l e c t :
Turn the key in steering lock to position 1.
Press buttonT. The indicator lamp in the button
illuminates.
To s w i tch o f f :
Press buttonT. The indicator lamp in the button
goes out.
This function selection is automatically switched off,
•if turning the key in steering lock to position 2,
•after approx. 30 minutes,
•if the coolant temperature is too low and
•if the battery voltage drops.
Note:
The fan switches to a lower speed independent of the
setting of the air volume control.

118 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Switching the automatic climate control on and off
To s witch of f:
Set air volume control wheel to position0.
The indicator lamp in the Ubutton goes out.
The fresh air supply to the vehicle interior is shut off.
While driving, use this setting only temporarily,
otherwise the windshield could fog up.
To s witch on:
Press the Ubutton. The indicator lamp in the button
illuminates.Switching off the rear passenger compartment
ventilation and rear passenger climate control
For an improved cooling or heating output in the front
passenger compartment, the rear passenger
compartment ventilation can be switched off.
To s w i tch o f f :
Press the REAR-OFF button, see page 110. The indicator
lamp in the button illuminates.
The operation of the rear automatic climate control in
the center console and the fresh air supply to the rear
compartment is shut off.
To a c t i va t e :
Press REAR-OFF button again. The indicator lamp in the
button goes out.
The rear automatic climate control in the center console
switches to automatic mode and fresh air enters the rear
compartment.
For notes on the rear passenger compartment climate
control, see page 119.

119 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Rear passenger compartment climate control
The climate control is located on the rear center console.
1Air volume switch
2Air distribution switch
3Automatic mode AUTO
Automatic control of air distribution and air volumeNote:
In the automatic mode, the automatic climate control
cools or heats the interior depending on the
temperature selected on the front climate control unit.
With the automatic mode switched off, the air volume
and distribution can still be set manually. The
temperature setting remains in the automatic mode.
Manual setting of air volume and air distribution in
the rear passenger compartment
To switch off the automatic mode press air volume
switch (1) or air distribution switch (2).
Air volume and distribution can be selected manually.
The indicator lamp in Ubutton goes out.
Air distribution manual:
jAir distribution up.
kAir distribution down.
To return to automatic mode:
Press Ubutton. The indicator lamp in the button
illuminates
P83.30-3525-26
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