cooling MERCEDES-BENZ CL-CLASS 2007 Owners Manual

Contents
Driving and parking............................ 378
Starting the engine....................... 378
Driving off .................................... 381
Turn signals.................................. 382
Problems while driving ................. 383
Parking......................................... 384
Turning off the engine .................. 387
Releasing seat belts ..................... 388
Automatic transmission ..................... 389
Gear selector lever ....................... 389
Shifting procedure ....................... 392
Transmission positions................. 393
Driving tips ................................... 396
Gear ranges ................................. 398
Automatic shift program .............. 399
Steering wheel gearshift control .. 400
Emergency operation
(Limp-Home Mode) ...................... 401
Instrument cluster ............................. 402
Adjusting instrument cluster
display illumination ...................... 402
Coolant temperature gauge ......... 403
Tachometer .................................. 403
Outside temperature indicator ..... 404
Fuel gauge ................................... 404Driving systems .................................. 405
Cruise control ............................... 405
DISTRONIC Plus* .......................... 411
Active Body Control (ABC) ............ 429
Parktronic system* ....................... 431
Park Assist* .................................. 435
Dynamic Rear View Monitor*........ 439
Night View Assist* ........................ 446
Air vents ............................................. 450
Opening and closing air vents ....... 452
Ventilated storage compartment .. 452
Automatic climate control .................. 453
Deactivating
climate control system ................. 455
Operating climate control
system in automatic mode............ 455
Setting temperature...................... 456
Adjusting air volume ..................... 456
Front defroster.............................. 456
Rear window defroster .................. 457
Maximum cooling
MAXCOOL (USA only) ................... 458
Air recirculation mode .................. 458
Residual engine heat
and ventilation .............................. 460Trunk .................................................. 461
Opening trunk ............................... 461
Closing trunk ................................ 462
Trunk emergency release ............. 464
Valet locking ................................. 465
Power tilt/sliding sunroof .................. 466
Opening and closing
power tilt/sliding sunroof ............. 466
Synchronizing ............................... 468
Loading and storing............................ 469
Loading instructions ..................... 469
Storage compartments ................. 469
Cup holders .................................. 473
Trunk ............................................ 474
Useful features ................................... 476
Sun visors ..................................... 476
Ashtray ......................................... 476
Cigarette lighter ............................ 477
Floormats* ................................... 478
Telephone* ................................... 479
Tele Aid ......................................... 482
Garage door opener ...................... 490
Infrared reflecting windshield ....... 496
ProCarManuals.com

244 Control systems
COMAND automatic climate control
You can operate the automatic climate
control via COMAND or via the buttons on
the automatic climate control panel
(
page 453).
Some of the special climate control func-
tions can only be set via COMAND.The following automatic climate control
functions can be operated via COMAND:
iThe components and operating principles of
COMAND can be found on (
page 81).
Warning!G
When operating the automatic climate con-
trol, the air that enters the passenger com-
partment through the air vents can be very
hot or very cold (depending on the set tem-
perature). This may cause burns or frostbite
to unprotected skin in the immediate area of
the air vents.
Always keep sufficient distance between un-
protected parts of the body and the air
vents. If necessary, use the air distribution
adjustment (
page 246) to direct the air to
air vents in the vehicle interior that are not
in the immediate area of unprotected skin.
Warning!G
Follow the recommended settings for heat-
ing and cooling given on the following pages
and pages in the “Controls in detail” part
(
page 453) Otherwise the windows could
fog up, impairing visibility and endangering
you and others.
FunctionPage
Temperature245
Air distribution246
Air volume246
Switching off cooling (“ACOFF”)247
Central climate control (“Mono”)248
Footwell temperature249
Air flow from air vents249
ProCarManuals.com

247 Control systems
COMAND automatic climate control
Changing air volume: Slide qmr or
rotate ymz.
Exiting menu: Press n, back
buttonL in the center console
(
page 82) or slideomp.
The setting is saved.Central climate control menu via
COMAND
The central climate control menu is in the
center of the climate control settings.
When the automatic climate control is
switched on, you will see “on” in the cen-
tral menu. The following functions can only
be operated in the central climate control
menu via COMAND:
Select climate control settings
Cen-
tral menu.Switching cooling on or off
The cooling function, only operational
when the engine is running, cools the vehi-
cle interior down to the selected tempera-
ture. The cooling function also
dehumidifies the air in the vehicle interior,
thus preventing the windows from fogging
up.
The “AC
OFF” function is used to permanent-
ly switch off the cooling function of the au-
tomatic climate control system.
FunctionPage
Switching off cooling (“ACOFF”)247
Central climate control (“Mono”)248
Footwell temperature249
Air flow from air vents249
iCondensation may drip out from underneath
the vehicle. This is normal and not an indication
of a malfunction.
ProCarManuals.com

248 Control systems
COMAND automatic climate control
Select climate control settings
Cen-
tral climate control menu.
Selecting “ACOFF”: Slide qmr or
rotateymz.
Confirming selection: Press n.
A checkmark appears when the cooling
is switched off.“AC
OFF” appears in the central menu of
the climate control settings.
Selecting “Mono” mode
“Mono” is used to adjust the climate zones
for the entire vehicle at the same time.
When the “Mono” function is switched on
and you change the climate on the driver’s
side, these changes will be carried out in
the same manner for all climate zones.
Select climate control settings
Cen-
tral climate control menu.
Selecting “Mono”: Slide qmr or
rotateymz.
Confirming selection: Press n.
A checkmark appears when the func-
tion has been selected.
Exiting menu: Press back button L
in the center console (
page 82) or
slideomp.
The “Mono” function is automatically
switched off when you:

change an automatic climate control
setting for the front passenger’s side
using COMAND

operate a button from the automatic
climate control for the front passen-
ger’s side

operate one of the buttons for the rear
climate control system
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 it-
self off.
Have the air conditioning checked at the nearest
authorized Mercedes-Benz Center.
ProCarManuals.com

249 Control systems
COMAND automatic climate control
Adjusting footwell temperature
The “Footwell Temperature” function is
used to adjust the temperature difference
between the footwell and the rest of the
passenger compartment.
The higher the selected value, the higher
the temperature in the footwell will be.
Select climate control settings
Cen-
tral climate control menu.
Selecting “Footwell Temperature”:
Slide qmr or rotate ymz and then
pressn.
Changing temperature difference:
Slide qmr or rotate ymz.
Exiting menu: Press n, back
buttonL in the center console
(
page 82) or slideomp.
The setting is saved.
Adjusting air flow from air vents
The “Airflow” setting defines air distribu-
tion and air volume in automatic mode:

“Focused” (default setting, increased
air flow)

“Medium” (reduced air flow)

“Diffuse” (minimal air flow)
Select climate control settings
Cen-
tral climate control menu
“Airflow”.A selection list appears.
The current setting is indicated by a
dotR.
Changing air flow: Slide qmr or
rotateymz.
Confirming selection: Press n.
iIn automatic mode, this setting optimizes
the footwell temperature when outside tempera-
tures are low.
iIn automatic mode, this setting optimizes
the air flow when outside temperatures are high.
iWhen the interior ambient temperature of
the vehicle is very hot and the automatic climate
control is cooling the interior, the setting for air
flow is temporarily overridden.
ProCarManuals.com

383 Controls in detail
Driving and parking
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 above
248°F (120°C)
The coolant is too hot and is no longer
cooling the engine.
Stop the vehicle in a safe location as
soon as possible and turn off the en-
gine. Allow engine and coolant to cool
off.
Check the coolant level and add cool-
ant if necessary (
page 518).In case of accident
If the vehicle is leaking gasoline:
Do not start the engine under any cir-
cumstances.
Move away from vehicle.
Notify local fire and/or police authori-
ties.
If the extent of the damage cannot be de-
termined:
Contact an authorized Mercedes-Benz
Center or call Roadside Assistance.
If no damage can be determined on the

major assemblies

fuel system

engine mount:
Start the engine in the usual manner.
iTo signal minor directional changes such as
changing lanes, press combination switch only
to point of resistance and release. The corre-
sponding turn signals will flash three times.
iExcessive coolant temperatures trigger a
warning message in the multifunction display
(
page 580).
ProCarManuals.com

454 Controls in detail
Automatic 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.
It can only function optimally when you are
driving with the windows and the tilt/slid-
ing sunroof closed.
It is possible to completely deactivate the
climate control system (
page 455). Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.The following automatic climate control
functions can be operated via COMAND:
iIf you have the air distribution and air vol-
ume automatically controlled, you can adjust the
temperature, footwell temperature and air flow.
The following basic settings are recommended:

Automatic air distribution control
(
page 453)

Temperature: 72°F (22°C) (page 456)

Footwell temperature: 0 (page 249)

Air flow: focused (page 249)
Warning!G
Follow the recommended settings for heat-
ing and cooling given on the following pages
and in the “COMAND automatic climate
control” section (
page 244). Otherwise
the windows could fog up, impairing visibili-
ty 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, see “Summer opening fea-
ture” (
page 376). The automatic climate con-
trol will then adjust the interior temperature to
the set value much faster.
Keep the air intake grille in front of the wind-
shield free of snow, leaves, sticks, and any other
debris.
Do not obstruct air volume by placing objects on
the air volume-through exhaust slots below the
rear window.
FunctionPage
Temperature245
Air distribution246
Air volume246
Switching off cooling (“ACOFF”)247
Central climate control (“Mono”)248
Footwell temperature249
Air flow from air vents249
ProCarManuals.com

455 Controls in detail
Automatic climate control
Deactivating climate control system
Deactivating: Press button´
(
page 453) up or down.
The indicator lamp on the button
comes on. You will see “Climate Con-
trol OFF” in the COMAND display.
Reactivating: Press button´
(
page 453) up or down.
The indicator lamp on the button goes
out. You will see the previous settings
in the COMAND display.Operating climate control system in
automatic mode
Air distribution and air volume is adjusted
automatically by the automatic climate
control system. You can also adjust the
settings for air distribution and air volume
manually.
Activating
Press buttonU (page 453) up or
down.
The indicator lamp on the button
comes on.Deactivating
Press buttonU (page 453) up or
down.
or
Adjust air distribution (page 246).
or
Adjust air volume (page 456).
The indicator lamp on buttonU
goes out. The automatic function is
switched off.
You can adjust the air distribution
(
page 246) or air volume
(
page 456) manually.
Warning!G
When the automatic climate control is
switched off, the outside air supply and cir-
culation are also switched off. Only choose
this setting for a short time. Otherwise the
windows could fog up, impairing visibility
and endangering you and others.
iIn automatic mode, cooling with dehumidify
is switched on. This function can be switched off
if necessary (
page 247).
ProCarManuals.com

458 Controls in detail
Automatic climate control
Maximum cooling MAXCOOL (USA only)
If U is selected on both the left and
right side and there is a high demand for
cooling, the display “MAXCOOL” appears
in the COMAND display.
This provides the fastest possible cooling
of the vehicle interior (when windows and
tilt/sliding sunroof are closed).
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside (e.g. before driving in a
tunnel). This setting cuts off the intake of
outside air and recirculates the air in the
passenger compartment.
Activating: Press button,
(
page 453) up or down.
The indicator lamp on the button
comes on.Warning!G
Any accumulation of snow and ice should be
removed from the rear window before driv-
ing. Visibility could otherwise be impaired,
endangering you and others.
iIf the rear window defroster switches off too
soon and the indicator lamp goes out, this indi-
cates that too many electrical consumers are op-
erating simultaneously and the load on the
battery is reducing available voltage. The system
responds automatically by deactivating the rear
window defroster.
iMaximum cooling MAXCOOL is only avail-
able when the engine is running.
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 247) is activated, or
press button;.
iThe air recirculation mode is activated auto-
matically at high outside temperatures.
The indicator lamp on button, is not lit when
the air recirculation mode is automatically acti-
vated.
A quantity of outside air is added when the cool-
ing demand is not at maximum.
If the air conditioning has been turned off
(
page 247) or the outside temperature is be-
low 41°F (5°C), the air recirculation mode will
not switch on automatically.
ProCarManuals.com

518 Operation
Engine compartment
Coolant level
The engine coolant is a mixture of water
and anticorrosion/antifreeze.
When checking the coolant level,

the vehicle must be parked on level
ground

the coolant temperature must be
below 158°F (70°C)
The coolant expansion tank is located on
the passenger side of the engine compart-
ment.
Example illustration from CL 550
1Cap
2Coolant expansion tank
Using a rag, turn cap1 slowly approx-
imately one half turn counterclockwise
to release any excess pressure.
Continue turning the cap counterclock-
wise and remove it.
The coolant level is correct if the level

for cold coolant: reaches the white
marking (plastic bridge) inside the cool-
ant expansion tank

for warm coolant: is approximately
0.6 in (1.5 cm) higher
Add coolant as required.
Replace and tighten cap1.
For more information on coolant, see the
“Technical data” section (
page 689).
Warning!G
In order to avoid 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.

Using a rag, slowly open the cap approx-
imately 1/2 turn to relieve excess pres-
sure. If opened immediately, scalding
hot fluid and steam will be blown out un-
der pressure.

Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene gly-
col which may burn if it comes into con-
tact with hot engine parts.
ProCarManuals.com