climate settings MERCEDES-BENZ C240 2003 W203 Owner's Manual

150 Controls in detailClimate controlThe climate control is operational whenev-
er the engine is running. You can operate
the climate control system in either the au-
tomatic or manual mode. The system cools
or heats the interior depending on the se-
lected interior temperature and the cur-
rent 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.
The air conditioning will not engage (no
cooling) if theAC
OFF
mode is selected
(
page 154).
Setting the temperature
Use the temperature controls2 and3
(page 149) to separately adjust the air
temperature on each side of the passenger
compartment. You should raise or lower
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C).
Increasing

Turn the control slightly to the right.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Decreasing

Turn the control slightly to the left.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
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.iIf 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 obstruct air flow by placing ob-
jects on the air flow-through exhaust
slots below the rear window.

151 Controls in detail
Climate control
Adjusting air distribution and volume
Use the air distribution control4
(page 149) to adjust the air distribution.
The following symbols are found on the
controls:
Adjusting manually

Press the
U
button.
The indicator lamp on the button goes
out.

Select any of the six air volume speeds
using the air volume control1
(page 149) and the air distribution.Adjusting automatically

Press the
U
button.
The indicator lamp on the button
comes on. The air distribution and vol-
ume is adjusted automatically.
Windshield fogged on the outside

Switch the windshield wipers on.

Switch to manual mode.

Turn the air distribution control
to
a
or
Y
.
Defrosting
Activating
Press button
P
.
The indicator lamp on the button
comes on.
or

Switch off air recirculation, if selected.
Press button
O
.
The indicator lamp on the button goes
out.

Close center air vents.

Open left and right side air vents and
adjust side air vents upwards.
Symbol
Function
a
Directs air through the center,
side and rear passenger
compartment air vents
Z
Directs air to the windows
X
Directs air into the entire
vehicle interior
Y
Directs air to the footwells
iThese settings should only be selected
for a short time.

158 Controls in detailAutomatic climate control*The 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.
The air conditioning will not engage (no
cooling) if theAC
OFF
mode is selected
(
page 149).
Setting the temperature
Use temperature controls1 and14 for the
left side or6 and7 for the right side to
separately adjust the air temperature on
each side of the passenger compartment.
You should raise or lower the temperature
setting in small increments, preferably
starting at 72°F (22°C).Increasing

Push temperature control1 and/or6.
The automatic climate control system
will correspondingly adjust the interior
air temperature.
Decreasing

Push temperature control7
and/or14.
The automatic climate control system
will correspondingly adjust the interior
air temperature.
Adding outside air

Turn thumbwheel3 in dashboard
(page 156) to increase airflow of out-
side air through air vents for center, left
and right sides and rear passenger
compartment.
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.
iIf 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 obstruct air flow by placing ob-
jects on the air flow-through exhaust
slots below the rear window.iWhen operating the climate control
system in automatic mode, you will
only rarely need to adjust the tempera-
ture, air volume and air distribution.

160 Controls in detailAutomatic climate control*Maximum cooling MAXCOOL
If the left and right air distribution controls
as well as the airflow volume control are
set to
U
and there is a high need for
cooling, the display “AUTO MAXCOOL” ap-
pears.
This provides the fastest possible cooling
of the vehicle interior (when windows and
sliding/pop-up roof* are closed).
Defrosting
Activating
Press button
P
.
The indicator lamp on the button lights
up.

Switch off air recirculation, if selected.

Press button
O
.
The indicator lamp on the button goes
out.

Close center air vents.

Adjust side air vents upwards.
Deactivating

Press button
P
.
The indicator lamp on the button goes
out. Defrosting is turned off.
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.
Activating
Press button
O
.
The indicator lamp on the button lights
up.
iThese settings should only be selected
for a short time.
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.

351 Index
Climate control 148
Adjusting 151
Defogging windshield 151
Defrosting 151
Setting the temperature 150
Clock 23, 122
Closing
Glove box 203
Hood 236
Side windows 187
Sliding/pop-up roof* 190, 289
Sliding/pop-up roof*
with SmartKey 191
Trunk lid 89
Windows 187
Windows with SmartKey 188
Closing sliding/pop-up roof*
In an emergency 289
Cockpit 20, 341
Cockpit management and data system
(COMAND*) 342
COMAND* see separate operating
instructionsCombination switch 104
High beam flasher 47
Turn signals 47
Windshield wipers 48
Consumer information 339
Control and operation of radio
transmitters 230
Control system 111, 342
AUDIO menu 116
Convenience submenu 129
Display digital speedometer 116
Functions 112, 115
Instrument cluster submenu 122
Lighting submenu 125
Malfunction memory menu 118
Menus 114, 115, 343
Multifunction display 111
Multifunction steering wheel 112
NAVI menu* 118
Selecting radio system 117
Settings menu 119
Standard display menu 116
Submenus 113, 115
TEL* menu 134
Trip computer menu 132
Vehicle submenu 128Convenience submenu 129
Activating easy-entry/exit
feature* 129
Setting key dependency 131
Setting parking position* for
exterior rear view mirror 131
Coolant 238, 336
Adding 239
Anticorrosion/antifreeze
quantity 336
Capacities 329
Checking level 238
Messages in display 266, 267
Temperature 232
Temperature display 108
Warning lamp 267
Coolant level
Checking 234, 238
Cruise control 193, 342
Canceling 194
Driving downhill 194
Driving uphill 194
Fine adjustment 195
Saving current speed 194
Setting speeds 195
Cruise control lever 193