Auto MERCEDES-BENZ C CLASS COUPE 2002 Service Manual

156
Climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
Basic setting – automatic mode
In the automatic mode the climate control cools or heats
the interior depending on outside temperature and the
selected interior temperature. With the automatic mode
switched off, the air volume and distribution can still be
set manually.
Press U button. Air volume and distribution are
controlled automatically.
We recommend to set the left and right temperature
to 72
°F (22
°C). Please make changes from this setting to
suit your personal requirements.
Heating mode:
To lower headroom temperature, use thumbwheel
(4, page 152).
Air conditioning mode:
Open air outlets at dashboard top center (7, page 152)
for an even air distribution. Special settings
(use only for short duration)
Air distribution and air volume, manual
Press U button. The indicator lamp in the button will
go out.
The air distribution for the right and left side operate
together.
Select any of the six air volume speeds and the air
distribution.
Air distribution, manual:
h Air from the center, side, dashboard top center
and rear passenger compartment air outlets.
j Air from the windshield, side defroster and rear
passenger compartment air outlets.
k Air from the center, side, footwell, rear footwell
and rear passenger compartment air outlets.
To return to automatic mode:
Press the U button. The indicator lamp in the button
illuminates.

158
Climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
Air recirculation
Select air recirculation:
The indicator lamp in the O button is not
illuminated.
Press button O briefly. The indicator lamp in the
button illuminates.
To switch off the air recirculation:
The indicator lamp in the O button is illuminated.
Press button O briefly. The indicator lamp in the
button goes out.
Switching on air recirculation and activating
convenience closing of power windows:
The indicator lamp in the O button is not
illuminated.
Press button O for more than 2 seconds, the side
windows will be closed. The indicator lamp in the button
illuminates. Switching off air recirculation and activating
convenience opening:
The indicator lamp in the
O button is illuminated.
Press button O for more than 2 seconds, the side
windows return to the position they were in before
closing.
A window opened manually after convenience closing
will no longer be returned to the position it was in
before closing when convenience opening is selected.
The system automatically switches from air
recirculation to fresh air:
• after 30 minutes if the outside temperature is above
about 40
°F(5
°C),
• after 5 minutes if the outside temperature is below
about 40
°F(5
°C),
• after 5 minutes if economy mode S is selected.
The system switches automatically to air recirculation at
high outside temperatures. A quantity of outside air is
added after a maximum of 30 minutes.
If the windows should fog up from the inside, switch
from recirculated air back to fresh air.

159
Climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical 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
S button to activate. The indicator lamp in the
button illuminates.
Press S button once again to return to the previous
setting. The indicator lamp in the button goes out.
Important!
In the S mode the windows could fog up on the
inside. Switch off S mode.
Climate control - OFF/ON
To switch the climate control off, set the air volume
control switch to position 0.
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 switch the climate control on again, or set air volume
control switch to any speed. 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 setting of the automatic
climate control. Air volume and distribution are
controlled automatically.
To s e l e c t :
Turn the electronic key in starter switch to position 1
or 0 or remove it altogether.
Press button
T. The indicator lamp in the button
illuminates.
This function selection will not activate if the battery
level is insufficient.
The function switches off automatically:
• if the electronic key in starter switch is turned to
position 2,
• after approximately 30 minutes,
• if the battery voltage drops.

160
Automatic climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
Automatic climate control (optional)
P83.20-2150-29

161
Automatic climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
1
Display and controls
2 Air volume control for left center air outlet
3 Center air outlet, left, adjustable
4 Thumbwheel for adding outside air at air outlets for
center, left and right sides, as well as dashboard top
center and rear passenger compartment
5 Center air outlet, right, adjustable 6
Air volume control for right center air outlet
7 Air volume control and air outlet on dashboard top
center
8 Air volume control for side air outlet
9 Side air outlet, adjustable
10 Side defroster outlet, fixed

162
Automatic climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
Display and controls
1 Temperature control, left, lowering
2 Temperature control, left, raising
3 Air distribution control switch left (automatic,
manual operation)
4 Activated charcoal filter, see page 168
5 Display
6 Air distribution control switch right (automatic,
manual operation) 7
Temperature control, right, raising
8 Temperature control, right, lowering
9 Rear window defroster, see page 170
10 Economy mode, see page 169
Residual engine heat utilization, see page 169
11 Air volume control +
switch on system
12 Air volume control -
switch off system
13 Air recirculation, see page 167
14 Defrosting, see page 166
Important!
This vehicle is equipped with an air conditioning
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.
P83.40-2303-26

163
Automatic climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
1
Temperature, left
2 Temperature, right
3 Air volume
4 Automatic mode is selected Automatic climate control
The system is always at operational readiness, except
when manually switched off.
The automatic climate control only operates with the
engine running.
The temperature selector should be left at the desired
temperature setting. The temperature selected is
reached as quickly as possible.
The system will not heat or cool any quicker by setting a
higher or lower temperature.
The desired interior temperature and air distribution
can be selected separately for the left and right side of
the passenger compartment. Adjust the temperature
settings in small increments.
The automatic climate control 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.
The air conditioning will not engage (no cooling) if the
economy mode
S is selected, see page 169.

164
Automatic climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
Notes:
Do not obstruct the air flow by placing objects on the air
flow-through exhaust slots below the rear window.
Also keep the air intake grill in front of the windshield
free of snow and debris.
The storage compartment between the front seats can be
ventilated. See page 171 for notes on ventilating the
storage space under the armrest in the center console.
The air conditioner switches itself off for its own
protection if refrigerant is lost. No cooling will then take
place. Economy mode S cannot be switched off. Have
the air conditioner checked by a Mercedes-Benz Center
should this happen.
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.
Dust filter
Nearly all dust particles and pollen are filtered out
before outside air enters the passenger compartment
through the air distribution system. Basic setting – automatic mode
In the automatic mode the automatic climate control
cools or heats the interior depending on the direction
and strength of the sunlight, outside temperature and
the selected interior temperature of the vehicle. With
the automatic mode switched off, the air volume and
distribution can still be set manually.
Briefly press left or right
U button. The h, j
and k symbols will no longer be visible.
The economy mode and air recirculation functions will
be switched off. The automatic blower will be activated
at the same time.
We recommend to set the temperature switches on the
left and right to 72
°F (22
°C). Please make changes from
this setting to suit your personal requirements.
Heating mode:
To lower headroom temperature, use thumbwheel
(4, page 160).
Air conditioning mode:
Open air outlets at dashboard top center (7, page 160)
for an even air distribution.

165
Automatic climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
Special settings
(use only for short duration)
Air distribution, manual
Press left or right U button. The button pops out, the
h , j and k symbols are visible. Turn the
button to select the air distribution desired.
h Air from the center, side, dashboard top center
and rear passenger compartment air outlets.
j Air from the windshield, side defroster and rear
passenger compartment air outlets.
k Air from the center, side, footwell, rear footwell
and rear passenger compartment air outlets.
To return to automatic mode:
Press left or right U button. The h, j
and k symbols will no longer be visible. Air volume, manual
Seven blower speeds are available.
Press right
Q or left M side of air volume control
switch until the requested blower speed is attained.
The display “AUTO” disappears and the automatic mode
is switched off. The selected blower speed is shown in
the display.
To return to automatic mode:
Press left or right U button until it clicks in. The
h , j andk symbols will no longer be visible.

166
Automatic climate control
Te ch n i c a l
data
Instruments
and controls Operation
DrivingInstrument
cluster display Practical hints Car care Index
Defrosting
Press the P button. The indicator lamp in the button
illuminates.
Maximum heated and automatically controlled amount
of air is directed to the defroster and windshield air
outlets.
Switch off air recirculation, if selected: Press
button O. The indicator lamp in the button will go
out.
Pressing the P button again returns the system to
the previous setting. Windows fogged up on the inside
Switch off the economy mode, if selected:
Press button
S. The indicator lamp in the button will
go out.
Switch off air recirculation, if selected:
Press button O. The indicator lamp in the button will
go out.
Set blower to the maximum blower speed.
Increase temperature setting.
Open the side air outlets and direct them onto the side
windows.
Windshield fogged up on the outside
Switch on the windshield wiper.
Close air outlet at dashboard top center (7, page 161).
Switch to manual mode.
Turn air distribution control switch to position h
or k .