2004 MERCEDES-BENZ C320S cooling

Contents
Manual transmission ......................... 141
Shifting into reverse ..................... 141
Automatic transmission* ................... 142
One-touch gearshifting................. 143
Gear ranges ................................. 144
Gear selector lever position ......... 145
Program mode selector switch..... 146
Accelerator position ..................... 147
Emergency operation
(Limp Home Mode) ...................... 147
Good visibility .................................... 148
Windshield wipers ........................ 148
Headlamp cleaning system* ........ 148
Rear view mirrors ......................... 149
Sun visors .................................... 151
Rear window sunshade* .............. 152
Rear window defroster ................. 153
Climate control .................................. 154
Setting the temperature ............... 156
Adjusting air distribution and
volume ......................................... 157
Defrosting .................................... 158
Air recirculation mode.................. 158
Deactivating the climate control
system ......................................... 159
Air conditioning ............................ 160Ventilated storage compartment .. 160
Rear passenger compartment
adjustable air vents....................... 161
Automatic climate control* ................ 162
Setting the temperature................ 165
Adjusting air distribution............... 166
Adjusting air volume ..................... 166
Maximum cooling MAXCOOL ........ 167
Defrosting ..................................... 167
Air recirculation mode .................. 167
Charcoal filter ............................... 169
Air conditioning............................. 170
Residual heat and ventilation ........ 171
Rear passenger compartment
adjustable air vents....................... 172
Audio system ...................................... 173
Audio and telephone, operation .... 173
Operating safety ........................... 173
Operating and display elements.... 174
Button and soft key operation....... 176
Operation ...................................... 176
Radio operation ............................ 179
Satellite radio (SAT)* (USA only)... 182
Cassette operation ....................... 186
CD changer* operation ................. 189
Telephone* operation ................... 193Power windows .................................. 200
Opening and closing
the windows ................................. 200
Synchronizing power windows ...... 202
Sliding/pop-up roof*.......................... 203
Opening and closing
the sliding/pop-up roof ................ 203
Synchronizing
the sliding/pop-up roof ................ 205
Driving systems .................................. 206
Cruise control ............................... 206
Loading .............................................. 209
Roof rack* .................................... 209
Ski sack* ...................................... 209
Split rear bench seat* .................. 212
Loading instructions ..................... 214
Useful features ................................... 216
Interior storage spaces ................. 216
Ashtrays........................................ 220
Cigarette lighter ............................ 221
Telephone* ................................... 222
Tele Aid* ....................................... 223
Garage door opener ...................... 231

49 Getting started
Driving
Problems while driving
The engine runs erratically and misfires

An ignition cable may be damaged.


The engine electronics may not be op-
erating properly.


Unburned gasoline may have entered
the catalytic converter and damaged it.

Give very little gas.

Have the problem repaired by an au-
thorized Mercedes-Benz Center as
soon as possible.
The coolant temperature is over 248°F
(120°C)
The coolant is too hot and is no longer
cooling the engine.

Stop the vehicle as soon as possible
and turn off the engine. Allow engine
and coolant to cool.

Check the coolant level and add cool-
ant if necessary (
page 257).In case of accident
If the vehicle is leaking gasoline:

Do not start the engine under any cir-
cumstances.

Notify local fire and/or police authori-
ties.
If the extent of the damage cannot be de-
termined:

Notify an authorized Mercedes-Benz
Center.
If no damage can be determined on the


major assemblies


fuel system


engine mount:

Start the engine in the usual manner.
!If anything blocks the windshield
wipers (leaves, snow, etc.), switch
them off immediately.

For safety reasons, withdraw
SmartKey from starter switch
before attempting to remove any
blockage.


Remove blockage.


Turn the windshield wipers on
again.
If windshield wipers fail to function at
all in switch positionI,


set the combination switch to the
next highest wiper speed


have the windshield wipers
checked at the nearest authorized
Mercedes-Benz Center

155 Controls in detail
Climate control
Climate control panel
The storage compartment between the
front seats can be ventilated (
page 160).
Item
1
Thumbwheel for air volume control
for left center air vent
2
Left center air vent, adjustable
3
Right center air vent, adjustable
4
Thumbwheel for air volume control
for right center air vent
5
Air volume control for side air vent
6
Side air vent, adjustable
7
Side defroster vent, fixed
8
Climate control paneliFor draft-free ventilation, move the
sliders for the center air vents2, 3
and6 to the middle position.
Item
1
Air volume control
2
Left-side temperature control
3
Right-side temperature control
4
Air distribution control
5
Rear window defroster
6
AC cooling on/off (AC
OFF
)
7
Air distribution and air volume
(automatic mode)
8
Air recirculation
9
Defrosting

156 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 160).
Setting the temperature
Use temperature controls2 and3
(page 155) 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 157).
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.

160 Controls in detailClimate controlAir conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.
Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the climate
control system. The air in the vehicle will
then no longer be cooled or dehumidified.
Press button± (
page 155).
The indicator lamp on the button
comes on.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press button± (
page 155).
The indicator lamp on the button goes
out.
The air conditioning uses the
refrigerant R134a. This refrigerant is free
of CFC’s which are harmful to the ozone
layer.
Ventilated storage compartment
The front center console storage compart-
ment has its own air vent that allows for
cooling ventilation when the automatic
climate control system is activated.
1Lever
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.
!If the air conditioning cannot be turned
on again, this indicates that the air
conditioning is losing refrigerant. The
compressor has turned itself off.
Have the air conditioning checked at
the nearest authorized Mercedes-Benz
Center.
iYou should keep this air vent closed
when outside temperatures are low.

163 Controls in detail
Automatic climate control*
Automatic climate control panel
Item
1
Thumbwheel for air volume control
for left center air vent
2
Left center air vent, adjustable
3
Thumbwheel for adding outside air
4
Right center air vent, adjustable
5
Thumbwheel for air volume control
for right center air vent
6
Thumbwheel for air volume control
for side air vent
7
Side air vent, adjustable
8
Side defroster vent, fixed
9
Automatic climate control paneliFor draft-free ventilation, move the
sliders for the center air vents2, 4
and7 to the middle position.
Item
1
Temperature control, left, raising
2
Left-side air distribution control
(automatic or manual mode)
3
Activated charcoal filter
4
Display
5
Right-side air distribution control
(automatic or manual mode)
6
Temperature control, right, raising
7
Temperature control, right,
lowering
8
Rear window defroster
9
AC cooling on/off (AC
OFF
)
Residual heat/ventilation
a
Air volume control
b
Automatic climate control on/off
(complete system)
c
Air recirculation
d
Defrosting
e
Temperature control, left, lowering

164 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 170).
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 166).
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.

167 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 163).
The indicator lamp on the button
comes on.
or

Switch off air recirculation, if selected.

Press buttonO (
page 163).
The indicator lamp on the button goes
out.

Close center air vents (
page 163).

Adjust side air vents upwards
(page 163).Deactivating

Press buttonP (
page 163).
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 163).
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.