2005 MERCEDES-BENZ C240 Climate control

178 Controls in detailClimate controlAdjusting air distribution and volume
Use air distribution control4
(page 175) to adjust the air distribution.
The following symbols are found on the
controls:
Use the air volume control1
(page 175) to adjust the air volume. You
can select between six air volume speeds.Adjusting manually

Press buttonU (
page 175).
The indicator lamp on the button goes
out.

Select any of the six air volume speeds
and the air distribution.
Adjusting automatically

Press buttonU (
page 175).
The indicator lamp on the button
comes on. The temperature, air distri-
bution and volume are adjusted auto-
matically.
Windshield fogged on the outside

Switch the windshield wipers on
(page 51).

Switch to manual mode.

Turn the air distribution control
toa orY.
Defrosting
Activating
Press buttonP (
page 175).
The indicator lamp on the button
comes on.
The air conditioning switches
automatically to the following functions:


maximum blowing and heating
power


air flows onto the windshield and
the front side windows


the air recirculation mode is
switched off
Symbol
Function
Z
Directs air to the windshield
and the side defroster vents
b
Directs air into the entire
vehicle interior
Y
Directs air to the footwells
a
Directs air through the center,
side and rear passenger
compartment air vents
iThese settings should only be selected
for a short time.

179 Controls in detail
Climate control
Deactivating
Press buttonP (
page 175).
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, (
page 175).
The indicator lamp on the button
comes on.
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.
Window fogging may impair visibility and
endanger you and others.
iIf you keep button, pressed the
side windows and tilt/sliding sunroof*
will close.Warning!
G
Never operate the side windows and the
tilt/sliding sunroof* if there is the possibility
of anyone being harmed by the closing pro-
cedure.
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 tilt/sliding
sunroof* can be immediately halted by
moving the tilt/sliding sunroof* switch in
the overhead control panel in any direction.
The closing of the side windows and
tilt/sliding sunroof* can be reversed by
again pressing and holding the, button.

180 Controls in detailClimate control
Deactivating
Press button, (
page 175).
The indicator lamp on the button goes
out.The air recirculation mode is deactivated
automatically:


after five minutes if the outside
temperature is below
approximately 41°F (5°C)


after five minutes if the air conditioning
is turned off


after 30 minutes if the outside
temperature is above
approximately 41°F (5°C)
At outside temperatures above 79°F
(26°C) the system will not automatically
switch back to outside air. A quantity of
outside air is added after approximately
30 minutes.
iThe air recirculation mode is activated
automatically at high outside tempera-
tures.
The indicator lamp on the, button
is not lit when the air recirculation
mode is automatically switched on.
After approx. 30 minutes, outside air is
added to the air inside the vehicle.
If you have turned off the air condi-
tioning (
page 181) or the outside
temperature is below 41°F (5°C), the
air recirculation mode will not switch
on automatically.
iIf you keep button, pressed the
side windows and tilt/sliding sunroof*
will return to their previous position.

181 Controls in detail
Climate control
Air 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 175).
The indicator lamp on the button
comes on.
The cooling function switches off after
a short delay.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press button± (
page 175).
The indicator lamp on the button goes
out.
The air conditioning uses the
refrigerant R134a. This refrigerant is free
of CFCs which are harmful to the ozone
layer.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.Warning!
G
If you turn off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog
up more quickly. Window fogging may
impair visibility and endanger you and
others.
!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.

182 Controls in detailClimate controlRear passenger compartment adjustable air vents
The air conditioning for the rear passenger
compartment is controlled via the climate
control panel (
page 175).The air vents for the rear passenger
compartment are located in the rear
center console.
1Left center air vent
2Thumbwheel for air volume control for
center air vents
3Right center air ventAdjusting air distribution

Push the slide for the left center
vent1 or right center vent3 to the
left, right, up or down.
The air flow is directed in the corre-
sponding direction.
Adjusting air volume

Turn thumbwheel2 up or down.
The air volume is increased or
decreased.
iThe temperature at the center air vents
for the rear passenger
compartment1 and3 i s t h e s a m e a s
at the dashboard center air vents.
iFor draft-free ventilation, push
slides1 and3 upward.

224 Controls in detailPower windows
Switch on ignition (
page 33).Opening the windows

Press switch1 to4 to the resistance
point.
The corresponding window will move
downwards until you release the
switch.
Closing the windows

Pull switch1 to4 to the resistance
point.
The corresponding window will move
upwards until you release the switch.Fully opening the windows
(Express-open)

Press switch1 to4 past the
resistance point and release.
The corresponding window opens
completely.
Fully closing the windows
(Express-close)

Pull switch1 to4 past the
resistance point and release.
The corresponding window closes
completely.
iYou can also open or close the
windows using the SmartKey (summer
opening/convenience closing feature)
(page 225).
You can close and reopen the windows
using the air recirculation button,
in the climate control panel
(page 175).
Warning!
G
If you pull and hold the switch up when
closing the window, and upward movement
of the window is blocked by some obstruc-
tion including but not limited to arms, hands,
fingers, etc., the automatic reversal will not
operate.

228 Controls in detailPower tilt/sliding sunroof*

Switch on ignition (
page 33).Opening and closing the power
tilt/sliding sunroof

To open, close, raise, or lower the
tilt/sliding sunroof, move the sunroof
switch to resistance point in the
required direction of arrows1 to4.
Release the sunroof switch when the
tilt/sliding sunroof has reached the
desired position.
Fully opening (Express-open) and
closing (Express-close) the power
tilt/sliding sunroof

To open or close the tilt/sliding
sunroof, move the sunroof switch past
the resistance point in the required
direction of arrow4 or3 and
release.
The tilt/sliding sunroof opens or closes
completely.
When leaving the vehicle, always remove the
SmartKey from starter switch, and lock your
vehicle. Do not leave children unattended in
the vehicle, or with access to an unlocked
vehicle. Unsupervised use of vehicle equip-
ment can cause an accident and/or serious
personal injury.!To avoid damaging the seals, do not
transport any objects with sharp edges
which can stick out of the tilt/sliding
sunroof.
Do not open the tilt/sliding sunroof if
there is snow or ice on the roof, as this
could result in malfunctions.
The tilt/sliding sunroof can be opened
or closed manually should an electrical
malfunction occur (
page 341).
iYou can also open or close the
tilt/sliding sunroof using the SmartKey
(summer opening/convenience closing
feature) (
page 229).
You can close and reopen the
tilt/sliding sunroof using the air
recirculation button, in the
climate control panel (
page 175).


397 Technical data
Consumer information
Consumer information
The following text is published as required
of all manufacturers of passenger cars
under Title 49, Code of U.S. Federal
Regulations, Part 575 pursuant to the
“National Traffic and Motor Vehicle Safety
Act of 1966”.Uniform tire quality grading
Quality grades can be found, where
applicable, on the tire sidewall between
tread shoulder and maximum section
width. For example:
All passenger car tires must conform to
federal safety requirements in addition to
these grades.Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled conditions
on a specified government test course. For
example, a tire graded 150 would wear
one and one-half (1
1/2) times as well on
the government course as a tire
graded 100. The relative performance of
tires depends upon the actual conditions
of their use, however, and may depart
significantly from the norm due to varia-
tions in driving habits, service practices
and differences in road characteristics and
climate.Traction
The traction grades, from highest to lowest
are AA, A, B, and C. Those grades
represent the tire’s ability to stop on wet
pavement as measured under controlled
conditions on specified government test
surfaces of asphalt and concrete. A tire
marked C may have poor traction
performance.
Treadwear
Traction
Temperature
200
AA
A
Warning!
G
The traction grade assigned to this tire is
based on straight ahead braking traction
tests, and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.