2007 MERCEDES-BENZ SLK CLASS cooling

186 Controls in detail
Automatic climate control*
Reactivating
Switch on the ignition (page 37).
Press button´ (page 184) again.
The previous settings are once again in
effect.
or
Press buttonU (page 184).
The indicator lamp on the button
comes on. Air volume and air dis-
tribution are adjusted automatically.
Operating the climate control system
in automatic modeActivating
Press buttonU (page 184) while
the engine is running.
The indicator lamp on the button
comes on. The air volume and air dis-
tribution are adjusted automatically.
Use temperature controls4and6
orbandc (
page 184) to sepa-
rately adjust the air temperature on
each side of the passenger com-
partment.
The temperature of the vehicle interior
is adjusted automatically.
Deactivating
Press buttonU (page 184) again.
The indicator lamp on the button goes
out. The air volume changes to level2
and the air distribution changes
tob. Automatic control of air
volume and air distribution is switched
off.
Setting the temperature
Use temperature controls4andc for
the driver’s side or6andb for the
passenger side (
page 184) 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). The automatic climate
control will adjust to the set temperature
as fast as possible.
iWhen operating the automatic climate
control system in automatic mode, you will only
rarely need to adjust the temperature, air volume
and air distribution.
In automatic mode, cooling with dehumidify is
switched on. This function can be switched off if
necessary.

188 Controls in detail
Automatic climate control*
Closing the cockpit air vent and center
air vents
Turn thumbwheels2,4andb
(
page 182) downward.
The cockpit air vent and the center air
vents are closed.
Opening and closing side air vents
Turn thumbwheels8andd
(
page 182) in the corresponding
direction.
Side air vents7ande are open or
closed.
Adjusting air volume
Use buttonU (
page 184) for auto-
matic mode or air volume control1
(
page 184) to adjust air volume
manually.
Eleven blower speeds are available.
Turn air volume control1
(
page 184) to the desired position.
The indicator lamp on buttonU
(
page 184) goes out.
The automatic operation of air volume
switches off.
Front defroster
You can use this setting to defrost the
windshield, for example if it is iced up.
You can also defog the windshield and the
side windows.
Activating
Press buttonP (page 184).
The indicator lamp on the button
comes on.
The air conditioning switches
automatically to the following functions:

cooling on to dehumidify

maximum blowing and heating
power

air flows onto the windshield and
the front side windows
iKeep this setting selected only until the
windshield or the side windows are clear again.
iWhen you have activated the front defroster
using buttonP, no other settings are
possible.

189 Controls in detail
Automatic climate control*
Deactivating
Press buttonP (page 184) again.
The indicator lamp on the button goes
out.
The previous settings are once again in
effect.
Windows fogged on the outside
Switch the windshield wipers on
(
page 56).
Press buttonU (page 184).
The indicator lamp on the button
comes on. Air distribution and air
volume are adjusted automatically.
If the automatic air distribution and air
volume are switched off:
Turn air distribution control8 to
positionaorY (
page 184).
Maximum cooling MAX COOL
When operating the automatic climate
control system in automatic modeU
and there is a high need for cooling,
MAX COOL is activated. This provides the
fastest possible cooling of the vehicle’s in-
terior (when retractable hardtop is closed).
MAX COOL will appear in displaye
(
page 184).
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside (e.g. before driving
through a tunnel). This setting cuts off the
intake of outside air and recirculates the
air in the interior.
iThe cooling remains switched on.
iKeep this setting selected only until the
windshield is clear again.
Warning!G
Fogged windows impair visibility, endanger-
ing you and others. If the windows begin to
fog on the inside, switching off the air
recirculation mode immediately should clear
interior window fogging. If interior window
fogging persists, make sure the air
conditioning (
page 180) is activated, or
press buttonP.

191 Controls in detail
Automatic climate control*
Convenience closing
Press and hold button, until the
windows are closed or have reached
the desired position.
The indicator lamp on the button
comes on. The air recirculation mode is
activated.Convenience openingPress and hold button, until the
windows are opened or have reached
the desired position.
The indicator lamp on the button
goes out. The air recirculation mode
is deactivated.
Air conditioning
The cooling function, only operational
when the engine is running, cools the
vehicle interior down to the selected
temperature. The cooling function also
dehumidifies the air in the vehicle interior,
thus preventing the windows from
fogging up.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
iThe closing of the windows can be immedi-
ately halted by releasing button,.iThe opening of the windows can be immedi-
ately halted by releasing button,.
A window will only return to its previous position
if it has not been moved to another position us-
ing the respective window switch after it was
closed with button,.
A window that has been moved will remain in its
current position if button, is used to reopen
the remaining windows.
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.
iCondensation may drip from underneath the
vehicle. This is normal and not an indication of a
malfunction.

192 Controls in detail
Automatic climate control*
Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the automatic
climate control system. The air in the
vehicle will then no longer be cooled or
dehumidified.
Press buttonœ (page 184).
The indicator lamp on the button goes
out.
Activating
Moist air can fog up the windows. You
can dehumidify the air with the air
conditioning.
Press buttonœ (page 184).
The indicator lamp on the button
comes on.
Residual heat and ventilation
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.Activating
Switch off the ignition (page 37).
Press buttonT (page 184).
The indicator lamp on the button
comes on. The display in the automatic
climate control panel remains switched
off.
Deactivating
Press buttonT (page 184) again.
The indicator lamp on the button goes
out.
iHow long the system will provide heating
depends on

the coolant temperature

the temperature set by the operator
The blower will run at speed setting1 regardless
of the air volume control setting.
iThe residual heat is automatically turned off:

when the ignition is switched on (page 37)

after about 30 minutes

if the battery voltage drops

196 Controls in detail
Audio system
Button and soft key operation
In these instructions, the alphanumeric
keypad (right side of radio panel) and the
function buttons (left side of radio panel)
are referred to as “buttons”. The four keys
below the display panel are referred to as
“soft keys”.Operation
Switching the unit on/off
Switching on
Turn the SmartKey in the starter switch
to position1 or2 (
page 37).
If the audio system was on as you
removed the SmartKey from the starter
switch, the audio system will
automatically come back on as you
turn the SmartKey to position1 or2.
or
PressDbutton.Switching off
Remove the SmartKey from the starter
switch.
or
PressDbutton.
Adjusting the volume
Turn rotary control ofEbutton.
The volume will increase or decrease
depending on the direction turned.
!Do not press directly in the display face.
Otherwise, the display will be damaged.
iIf the radio is switched on without the
SmartKey in the starter switch, it will automati-
cally switch off again after approximately
30 minutes.
If your vehicle is equipped with a mobile
telephone*, the display may prompt you to enter
your PIN (GSM network) or code (TDMA or
CDMA network).
iShould excessively high temperatures occur
while the audio system is being operated, the
display will dim. If temperatures continue to rise,
HIGH TEMP will appear in the display, after which
the audio system will be switched off for a
cooling-down period.
iIf your vehicle equipment includes a
Mercedes-Benz specified mobile telephone*,
you can adjust its volume separately from the
volume of the audio system while the telephone
is being used.

300 Operation
Engine compartment
Unscrew filler cap1 from filler neck.
Add engine oil as required.
Be careful not to overfill with oil.
Be careful not to spill any oil when adding.
Avoid environmental damage caused by oil
entering the ground or water.
Screw filler cap1 back on filler neck.
For more information on engine oil, see
“Technical data” (
page 443) and
(
page 445).
Transmission fluid level*
Vehicles with automatic transmission*:
The transmission fluid level does not need
to be checked. If you notice transmission
fluid loss or gear shifting malfunctions,
have an authorized Mercedes-Benz Center
check the transmission.Coolant level
The engine coolant is a mixture of water
and anticorrosion/antifreeze. To check
the coolant level, the vehicle must be
parked on level ground and the engine
must be cool.
!Excess oil must be siphoned or drained off.
It could cause damage to the engine and
emission control system not covered by the
Mercedes-Benz Limited Warranty.Warning!G
In order to avoid any potentially serious
burns:

Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature gauge indi-
cates that the coolant is overheated.

Do not remove pressure cap on coolant
reservoir if coolant temperature is
above 158°F (70°C). Allow engine to
cool down before removing cap. The
coolant reservoir contains hot fluid and
is under pressure.

370 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
•The cooling fan for the coolant is
malfunctioning.Observe the coolant temperature display
(
page 127).
If the coolant temperature is below 120°C,
you may continue driving to the nearest
specialist workshop.
Avoid heavy loads on the engine (e.g. by
driving uphill) as well as stop-and-go traffic.
Have the fan replaced as soon as possible.
/Top up coolant
See Oper. ManualThe coolant level is too low.Add coolant (page 300).
Comply with all warnings while doing so.
If you have to add coolant frequently,
have the cooling system checked by an au-
thorized Mercedes-Benz Center.
Warning!G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You could be seriously burned.
!Do not ignore the low engine coolant level
warning. Extended driving with this message and
symbol displayed may cause serious engine
damage not covered by the Mercedes-Benz
Limited Warranty. Do not drive without sufficient
amount of coolant in the cooling system. The
engine will overheat, causing major engine
damage.