2002 MERCEDES-BENZ ML320 engine

97 Exterior lamp switch
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Exterior lamp switch
Rotate switch $ to positions:
DOff
UAutomatic headlamp mode, see page 99.
CParking lamps (also side marker lamps, taillamps,
license plate lamps, instrument panel lamps).
Canada only: When the engine is running, the low
beam is additionally switched on.
õParking lamps plus low beam or high beam
headlamps (switch pushed forward).ƒStanding lamps, left or right side (depending on
turn signal switch position). Turn key in steering
lock to position 0 or remove.
Standing lamps, left – move stalk to position (5).
Standing lamps, right – move stalk to position (4).
Move stalk to positions:
1Low beam (exterior lamp switch position õ)
2High beam (exterior lamp switch position õ)
3High beam flasher (high beam available
independent of exterior lamp switch position)
4Turn signals, right
5Turn signals, left
To signal minor directional changes, such as changing
lanes on a highway, move exterior lamp switch brief ly to
the point of resistance only and release. The turn
signals blink three times.
To operate the turn signals continuously, move the
exterior lamp switch past the point of resistance (up or
down). The switch is automatically canceled when the
steering wheel is turned to a large enough degree.
Auto
P54.25-2478-26

99 Exterior lamp switch
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Headlamp mode
The headlamps can be switched on and off manually or
automatically.
Manual operation:
The low beam headlamps and parking lamps can be
switched on and off with the exterior lamp switch. For
exterior lamp switch, see page 97.
Automatic operation:
With electronic key in steering lock in position 1 turn
exterior lamp switch to positionU.
The parking lamps switches on and off automatically
depending on the brightness of the ambient light.With the engine running and exterior lamp switch in
positionU:
USA only:
The low beam headlamps and parking lamps are
switched on and off automatically depending on the
brightness of the ambient light.
Canada only:
In conjunction with the daytime running lamps, see
page 100, in low ambient light conditions the parking
lamps will also switch on.
Note:
The high beam headlamps, high beam flasher, low beam
headlamps, parking lamps can still be switched on and
off manually using the exterior lamp switch.
The headlamps will not be automatically switched on
under foggy conditions.
Front fog lamps and rear fog lamps cannot be switched
on manually with exterior lamp switch in positionU.
To activate the fog lamps turn exterior switch to
positionB.
Wa r n i n g !
The driver is responsible for the operation of the
vehicle’s lights at all times. The automatic
headlamp feature is only an aid to the driver.
Switch on the vehicle lights by hand when driving
or traffic conditions require you to do so.

100 Exterior lamp switch
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Daytime running lamp mode (Canada only)
Turn exterior lamp switch to positionD.
When the engine is running the low beam headlamps
are automatically switched on. In low ambient light
conditions the parking lamps will also switch on.
When shifting from a driving position to position “N”
or “P”, the exterior lamps switches off (3 minutes delay).For nighttime driving the exterior lamp switch should
be turned to position õ or U to permit activation
of the high beam headlamps.
Note:
The high beam flasher is always available.

101 Exterior lamp switch
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Night security illumination
This function will be only active with exterior lamp
switch in positionU.
When turning off the engine, the exterior lamps
(parking lamps and fog lamps) switch on for added
illumination. After the last door has been closed the
lamp-on time period commences.
The lamp-on time period for night security illumination
can be set at several different timed levels from 0 (off) to
60 seconds, see “Setting illumination time” on
page 102.Notes:
Within 10 minutes after closing the last door or the
tailgate the night security illumination can be
reactivated by opening a door or the tailgate.
If after switching the engine off, no doors are opened or
if after opening the doors or trunk they are not closed,
the night security illumination will switch off
automatically after 60 seconds.
Deactivating night security illumination temporarily:
Turn the electronic key in steering lock to position 0
then to position 2 and back to position 0 again before
getting out of the vehicle. The night security
illumination will not be activated when the door is
opened.

110 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Front display and controls
1Air volume control wheel
2Temperature control
3Air distribution control wheel4Defrosting, see page 115
5Air recirculation, see page 116
6Automatic mode AUTO
Automatic control of temperature, air distribution
and air volume
7AC
OFF
, economy mode see page 117
Residual engine heat utilization, see page 117
8Rear window defroster, see page 121
9Rear passenger compartment ventilation switched
off, see page 118
10Interior temperature sensor
Important!
This vehicle is equipped with an air conditioner system
that uses R–134a (HFC: hydrofluorocarbon) as a
refrigerant. Repairs should always be performed by a
qualified technician, and refrigerant should be collected
in a recovery system for recycling.
1
2
3
45
6
10
89
P83.30-3550-26
7

111 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Automatic climate control
The automatic climate control only operates with the
engine running.
The system is always at operational readiness, except
when manually switched off.
In the automatic mode the automatic climate control
cools or heats the interior depending on outside
temperature and the selected interior temperature.
Make the temperature settings in small increments.
If the vehicle interior has been heated by direct sunlight
and is very hot, ventilate the interior (open door or
windows for a short period) before driving off
Keep the air intake grill in front of the windshield free
of debris and snow.
The air conditioning mode removes considerable
moisture from the air during operation in the cooling
mode. It is normal for water to drip on the ground
through ducts in the underbody.
If the economy mode AC
OFF
is selected, the air
conditioning compressor will not engage and it is not
possible to air condition in this setting. See page 117.Notes:
The interior temperature sensor (10) should not be
touched to maintain a precise temperature.
If the vehicle travels from shade into direct sunlight, a
sensor automatically increases the air volume
temporarily to maintain the interior temperature.
The automatic climate control will not remove moisture
from the air at low outside ambient temperatures.
The air conditioner switches itself off for its own
protection if refrigerant is lost. No cooling will then take
place. Economy mode AC
OFF
cannot be switched off.
Have the air conditioner checked by a Mercedes-Benz
Center should this happen.
Dustfilter
Nearly all dust particles and pollen are filtered out
before outside air enters the passenger compartment
through the air distribution system.
Severe conditions (e.g. strong air pollution) may require
replacement of the filter before its scheduled interval.
A clogged filter will reduce the air volume to the
interior.

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

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.