2004 MERCEDES-BENZ C240 4MATIC WAGON climate settings

152 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 the modeAC
OFF
is selected
(
page 156).
Setting the temperature
Use temperature controls2 and3
(page 151) 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).
Warning!
G
When operating the climate control, the air
that enters the passenger compartment
through the air vents in the footwell can be
very hot or very cold (depending on the set
temperature). This may cause burns or frost-
bite on unprotected skin in the immediate
area of the air vents. Always keep sufficient
distance between unprotected parts of the
body and the footwell air vents. If necessary,
change the air flow using the air distribution
controls to direct the air away from the foot-
well air vents (
page 153).
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.
iSevere 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.
If 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
objects on the air flow-through exhaust
slots below the rear window.

154 Controls in detailClimate controlDefrosting
Activating
Press buttonP (
page 151).
The indicator lamp on the button
comes on.
or

Switch off air recirculation, if selected.
Press buttonO (
page 151).
The indicator lamp on the button goes
out.

Close center air vents (
page 151).

Open left and right side air vents
(page 151) and adjust side air vents
upwards.Deactivating

Press buttonP (
page 151).
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 buttonO (
page 151).
The indicator lamp on the button
comes on.
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.
iIf you keep buttonO pressed the
side windows and sliding/pop-up roof*
will close.Warning!
G
Never operate the side windows and the
sliding/pop-up roof* if there is the
possibility of anyone being harmed by the
closing procedure.
In the event that the closing procedure
causes potential danger, the closing of the
side windows can be immediately halted by
pressing or pulling the respective window
switch. The closing of the sliding/pop-up
roof* can be immediately halted by moving
the sliding/pop-up roof* switch in the
overhead control panel in any direction.

160 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 166).
Warning!
G
When operating the automatic climate
control, the air that enters the passenger
compartment through the air vents in the
footwell can be very hot or very cold
(depending on the set temperature). This
may cause burns or frostbite on unprotected
skin in the immediate area of the air vents.
Always keep sufficient distance between
unprotected parts of the body and the foot-
well air vents. If necessary, change the air
flow using the air distribution controls to
direct the air away from the footwell air
vents (
page 162).
Warning!
G
Follow the recommended settings for
heating and cooling given on the following
pages. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.

163 Controls in detail
Automatic climate control*
Maximum cooling MAXCOOL
If the left and right air distribution controls
as well as the airflow volume control are
set toU and there is a high need for
cooling, the display “MAXCOOL” appears.
This provides the fastest possible cooling
of the vehicle interior (when windows and
sliding/pop-up roof* are closed).
Defrosting
Activating
Press buttonP (
page 159).
The indicator lamp on the button
comes on.
or

Switch off air recirculation, if selected.

Press buttonO (
page 159).
The indicator lamp on the button goes
out.

Close center air vents (
page 159).

Adjust side air vents upwards
(page 159).Deactivating

Press buttonP (
page 159).
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 buttonO (
page 159).
The indicator lamp on the button
comes on.
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.

368 Index
Upholstery 271
Windows 270
Windshield 48
Wiper blades 270
Wood trims 272
Climate control 150
Adjusting 153
Defogging windshield 153
Defrosting 154
Setting the temperature 152
Clock 23, 124
Closing
Glove box 215
Hood 253
Side windows 197
Sliding/pop-up roof 199, 309
Sliding/pop-up roof with
SmartKey 200
Tailgate 88
Windows 196
Windows with SmartKey 198Closing sliding/pop-up roof
In an emergency 309
Cloth upholstery
Cleaning 272
Cockpit 20, 357
Cockpit management and
data system (COMAND*) 358
COMAND*
See separate operating instructions
Combination switch 103
High beam flasher 47, 104
Turn signals 46
Windshield wipers 47
Comfort driving
Transmission program mode 143
Consumer information 355
Control and operation of radio
transmitter 246
Control system 111, 358
AUDIO menu 116
Convenience submenu 132
Display digital speedometer 116Functions 112, 115
Instrument cluster submenu 124
Lighting submenu 127
Malfunction memory menu 120
Menus 114, 115
Multifunction display 111
Multifunction steering wheel 112
NAVI menu 119
Selecting radio system 117
Selecting satellite radio* system 117
Settings menu 121
Standard display menu 116
Submenus 113, 115
TEL* menu 136
Trip computer menu 134
Vehicle submenu 131
Convenience submenu 132
Activating easy-entry/exit
feature 132
Setting key dependency 133
Setting parking position for
exterior rear view mirror 134