cooling MERCEDES-BENZ CLS 2012 Owners Manual

1, 2, 3 ...
12 V socket see Sockets
4ETS
see ETS/4ETS (Electronic
Traction System)
4MATIC off-road system ................... 171
A
ABS (Anti-lock Braking System) Display message ............................ 217
Function/notes ................................ 61
Important safety notes ....................61
Warning lamp ................................. 244
Activating/deactivating cooling
with air dehumidification ................. 122
Active Blind Spot Assist Activating/deactivating (on-
board computer) ............................ 207
Function/information ....................188
Active Driving Assistance package . 187
Active Lane Keeping Assist Activating/deactivating (on-
board computer) ............................ 207
Display message ............................ 231
Function/information ....................191
Active Light System
Display message ............................ 226
Active multicontour seat .................... 96
Active Parking Assist Display message ............................ 232
Important safety notes ..................175
Active service system PLUS
see ASSYST PLUS service interval
display
ADAPTIVE BRAKE ................................. 67
Adaptive Highbeam Assist Display message ............................ 226
Function/notes ............................. 109
Switching on/off (on-board
computer) ...................................... 209
Additives (engine oil) ........................ 349
Air bags Display message ............................ 223
Front air bag (driver, front
passenger) ....................................... 40
Important safety notes ....................38
Knee bag .......................................... 40
PASSENGER AIRBAG OFF
indicator lamp .................................. 43
Pelvis air bag ................................... 42
Safety guidelines ............................. 37
Side impact air bag ..........................41
Window curtain air bag ....................42
Air-conditioning system
see Climate control
AIR FLOW ........................................... 123
AIRMATIC Display message ............................ 229
Function/notes ............................. 168
Air pressure
see Tire pressure
Air vents
Glove box ....................................... 128
Important safety notes ..................127
Rear ............................................... 129
Setting ........................................... 127
Setting the center air vents ...........128
Setting the side air vents ...............128
Alarm system
see ATA (Anti-Theft Alarm system)
Alertness Assistant
see ATTENTION ASSIST
Ambient lighting
Setting the brightness (on-board
computer) ...................................... 209
Setting the color (on-board
computer) ...................................... 210
AMG adaptive sport suspension
system ................................................ 170
AMG menu (on-board computer) ..... 213
Anti-lock Braking System see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Anti-theft system
ATA (Anti-Theft Alarm system) .........69
Ashtray ............................................... 264
Assistance menu (on-board
computer) .......................................... 206
ASSYST PLUS see ASSYST PLUS service interval
display 4Index

C
Calling up a malfunction see Display messages
Capacities
see Technical data
Car
see Vehicle
Care
Carpets .......................................... 292
Car wash ........................................ 286
Display ........................................... 290
Exterior lights ................................ 289
Gear or selector lever ....................291
Matte finish ................................... 288
Night View Assist Plus ...................290
Notes ............................................. 285
Paint .............................................. 287
Plastic trim .................................... 290
Power washer ................................ 287
Rear view camera .......................... 289
Roof lining ...................................... 292
Seat belt ........................................ 292
Seat cover ..................................... 291
Sensors ......................................... 289
Steering wheel ............................... 291
Tail pipes ....................................... 290
Trim pieces .................................... 291
Washing by hand ........................... 287
Wheels ........................................... 287
Windows ........................................ 288
Wiper blades .................................. 289
Wooden trim .................................. 291
Cargo tie down rings ......................... 260
Car wash (care) ................................. 286
CD player/CD changer (on-board
computer) .......................................... 203
Cell phone see Mobile phone
Center console
Lower section .................................. 31
Lower section (AMG vehicles) ..........32
Upper section .................................. 30
Central locking
Automatic locking (on-board
computer) ...................................... 211
Locking/unlocking (SmartKey) ........72Changing bulbs
Important safety notes ..................112
Overview of bulb types ..................113
Reversing lamps ............................ 113
Child-proof locks
Important safety notes ....................59
Rear doors ....................................... 59
Children
In the vehicle ................................... 55
Restraint systems ............................ 55
Child seat
LATCH-type (ISOFIX ) child seat
anchors ............................................ 57
Special seat belt retractor ...............57
Top Tether ....................................... 58
Cigarette lighter ................................ 265
Classification system for
occupants (OCS) Faults ............................................... 47
Operation ......................................... 43
System self-test ............................... 46
Climate control
3-zone automatic climate control ..121
Controlling automatically ...............123
Cooling with air dehumidification ..122
Defrosting the windshield ..............125
Demisting the windows .................. 126
Dual-zone automatic climate
control ........................................... 119
Important safety notes ..................118
Indicator lamp ................................ 123
Maximum cooling .......................... 125
Notes on using automatic climate
control ................................... 120, 122
Overview of systems ......................118
Problems with cooling with air
dehumidification ............................ 123
Problem with the rear window
defroster ........................................ 126
Rear control panel .........................121
Refrigerant ..................................... 350
Setting the air distribution .............124
Setting the airflow .........................124
Setting the air vents ......................127
Setting the climate mode (AIR
FLOW) ............................................ 123
Setting the temperature ................1236Index

Setting the temperature (rear
compartment) ................................ 124
Switching air-recirculation mode
on/off ............................................ 126
Switching on/off ........................... 122
Switching residual heat on/off ......127
Switching the rear window
heating on/off ............................... 126
Switching the ZONE function on/
off .................................................. 125
Cockpit
Overview .......................................... 26
see Instrument cluster
Collapsible spare wheel
Inflating ......................................... 300
see Emergency spare wheel
COMAND
see separate operating instructions
Combination switch .......................... 108
Compass Calibrating ..................................... 278
Calling up ....................................... 277
Setting ........................................... 277
Consumption statistics (on-board
computer) .......................................... 201
Convenience closing feature .............. 87
Convenience opening feature ............ 87
Coolant (engine) Checking the level .........................282
Display message ............................ 226
Notes ............................................. 350
Temperature (on-board computer) . 213
Temperature gauge ........................ 196
Warning lamp ................................. 249
Cooling
see Climate control
Cornering light (display message) ... 224
Cornering light function Function/notes ............................. 109
Crash-responsive emergency
lighting ............................................... 111
Cruise control Cruise control lever .......................155
Deactivating ................................... 156
Display message ............................ 234
Driving system ............................... 155
Function/notes ............................. 155
Important safety notes ..................155LIM indicator lamp .........................155
Setting a speed .............................. 156
Storing and maintaining current
speed ............................................. 155
Cup holder
Center console .............................. 262
Important safety notes ..................261
Rear compartment .........................262
Customer Assistance Center (CAC) ... 23
Customer Relations Department ....... 23
D
Dashboard see Cockpit
Daytime running lamp mode
see Daytime running lamps
Daytime running lamps
Display message ............................ 225
Switching on/off (on-board
computer) ...................................... 209
Switching on/off (switch) ..............107
Delayed switch-off
Exterior lighting (on-board
computer) ...................................... 210
Interior lighting .............................. 210
Digital speedometer ......................... 201
DIRECT SELECT lever see Automatic transmission
Display (cleaning instructions) ........ 290
Display messages Calling up (on-board computer) .....216
Driving systems ............................. 229
Engine ............................................ 226
General notes ................................ 216
Hiding (on-board computer) ...........216
Key ................................................ 239
KEYLESS-GO .................................. 239
Lights ............................................. 224
Safety systems .............................. 217
Service interval display ..................284
Tires ............................................... 234
Vehicle ........................................... 237
Distance display (on-board
computer) .......................................... 206
Distance recorder ............................. 201
see Odometer
see Trip odometer
Index7

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Please read the information on qualified
specialist workshops ( Y page 22).
Overview of climate control systems
Important safety notes
GWARNING
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled replacement interval. A clogged
filter will reduce the air volume to the interior
and the windows could fog up, impairing
visibility and endangering you and others.
Have a blocked filter replaced at a Mercedes-
Benz Center as soon as possible.
GWARNING
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.
The automatic climate control/automatic
climate control controls the temperature and
the humidity of the vehicle interior and filters
out undesirable substances from the air.
The automatic climate control is only
operational when the engine is running. 10
Optimum operation is only achieved if you
drive with the side windows and sliding
sunroof/panorama roof with power tilt/
sliding panel closed.
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature ( Y page 87).
This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly.
i The integrated filter can filter out most
particles of dust and completely filters out
pollen. A clogged filter reduces the amount
of air supplied to the vehicle interior. For
this reason, you should always observe the
interval for replacing the filter, which is
specified in the Service Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet.10 The residual heat function can only be activated/deactivated when the ignition is switched off.118Overview of climate control systemsClimate control

Control panel for dual-zone automatic climate control
Canada only
:To set the temperature, left (Y page 123);To defrost the windshield ( Y page 125)=To switch the ZONE function on/off ( Y page 125)?To activate/deactivate cooling with air dehumidification ( Y page 122)ATo switch the rear window defroster on/off ( Y page 126)BTo set the temperature, right ( Y page 123)CTo activate/deactivate air-recirculation mode ( Y page 126)DTo set the air distribution ( Y page 124)ETo increase the airflow ( Y page 124)FTo reduce the airflow ( Y page 124)GTo switch climate control on/off ( Y page 122)HTo set climate control to automatic ( Y page 123)Overview of climate control systems119Climate controlZ

USA only
:To set the temperature, left (Y page 123);To defrost the windshield ( Y page 125)=To switch maximum cooling MAX COOL on/off ( Y page 125)?To activate/deactivate cooling with air dehumidification ( Y page 122)ATo switch the rear window defroster on/off ( Y page 126)BTo set the temperature, right ( Y page 123)CTo activate/deactivate air-recirculation mode ( Y page 126)DTo set the air distribution ( Y page 124)ETo increase the airflow ( Y page 124)FTo reduce the airflow ( Y page 124)GTo switch climate control on/off ( Y page 122)HTo set climate control to automatic ( Y page 123)Notes on using dual-zone automatic
climate control
The following contains notes and
recommendations on optimum use of dual-
zone automatic climate control.
R Activate climate control using the à and
¿ buttons. The indicator lamps in the
à and ¿ buttons light up.
R Set the temperature to 72 ‡ (22 †).
R Only use the "defrosting" function briefly
until the windshield is clear again.
R Only use "air-recirculation" mode briefly,
e.g. if there are unpleasant outside odorsor when in a tunnel. The windows could
otherwise fog up as, in air-recirculation
mode, no fresh air is drawn into the vehicle.
R Use the ZONE function to adopt the
temperature settings on the driver's side
for the front-passenger side as well. The
indicator lamp in the á button goes out.120Overview of climate control systemsClimate control

Control panel for 3-zone automatic climate control
Canada only
:To set the temperature, left (Y page 123);To defrost the windshield ( Y page 125)=To activate/deactivate the residual heat function ( Y page 127)?To activate/deactivate cooling with air dehumidification ( Y page 122)ATo switch the rear window defroster on/off ( Y page 126)BTo set the temperature, right ( Y page 123)CTo switch the ZONE function on/off ( Y page 125)DTo switch climate control on/off ( Y page 122)ETo set the air distribution ( Y page 124)FTo increase the airflow ( Y page 124)GTo reduce the airflow ( Y page 124)HTo adjust the climate control settings (AIR FLOW) ( Y page 123)ITo activate/deactivate air-recirculation mode ( Y page 126)JTo set climate control to automatic ( Y page 123) Rear control panelKTo increase the airflow ( Y page 124)LTo reduce the airflow ( Y page 124)MDisplayNTo reduce the temperature ( Y page 123)OTo increase the temperature ( Y page 123)Overview of climate control systems121Climate controlZ

Notes on using 3-zone automatic
climate control
The following contains instructions and
recommendations to enable you to get the
most out of your automatic climate control.
R Activate climate control using the à and
¿ buttons. The indicator lamps in the
à and ¿ buttons light up.
R In automatic mode, you can also use the
ñ button to set a climate mode
(FOCUS/MEDIUM/DIFFUSE). The
MEDIUM level is recommended.
R Set the temperature to 72 ‡ (22 †).
R Only use the "defrosting" function briefly
until the windshield is clear again.
R Only use "air-recirculation" mode briefly,
e.g. if there are unpleasant outside odors
or when in a tunnel. The windows could
otherwise fog up as, in air-recirculation
mode, no fresh air is drawn into the vehicle.
R Use the ZONE function to adopt the
temperature settings on the driver's side
for the front-passenger side and the rear
compartment as well. The indicator lamp in
the á button goes out.
R Use the residual heat function if you want
to heat or ventilate the vehicle interior
when the ignition is switched off. The
"residual heat" function can only be
activated or deactivated with the ignition
switched off.
Operating the climate control system
Activating/deactivating climate
control
Important information
GWARNING
When the climate control system is
deactivated, the outside air supply and
circulation are also deactivated. Only choose
this setting for a short time. Otherwise the
windows could fog up, impairing visibility and
endangering you and others.
i Switch on climate control primarily using
the à button ( Y page 123).
Activating/deactivatingXTurn the SmartKey to position 2 in the
ignition lock.XTo switch on: press the à button.
The indicator lamp in the à button lights
up. Airflow and air distribution are set to
automatic mode.
or
XPress button ^.
The indicator lamp in the ^ button goes
out. The previously selected settings come
into effect again.XTo switch off: press the ^ button.
The indicator lamp in the ^ button lights
up.
Activating/deactivating the cooling
with air dehumidification function
Important information
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
GWARNING
If you switch 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.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a
malfunction.
122Operating the climate control systemClimate control

iThe cooling with air dehumidification
function uses refrigerant R134a. This
coolant does not contain
chlorofluorocarbons, and therefore does
not damage the ozone layer.
Activating/deactivatingXTo activate: press the ¿ button.
The indicator lamp in the ¿ button lights
up.XTo switch off: press the ¿ button.
The indicator lamp in the ¿ button goes
out. The cooling with air dehumidification
function has a delayed switch-off feature.
Problems with the cooling with air
dehumidification function
When you press the ¿ button, the
indicator lamp in the button flashes three
times or remains off. You can no longer switch
on the cooling with air dehumidification
function.
XConsult a qualified specialist workshop.
Setting climate control to automatic
GWARNING
If you switch 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.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature of the dispensed air, the airflow
and the air distribution.
Automatic mode will achieve optimal
operation if cooling with air dehumidification
is also activated. If desired, cooling with air
dehumidification can be deactivated.
Adjusting the climate mode settings
(AIR FLOW)
This function is only available with automatic
climate control.
The climate control settings are especially
effective at high temperatures.
You can select the following climate control
settings in automatic mode:FOCUShigh airflow that is set slightly
coolerMEDIUMmedium airflow, standard settingDIFFUSElow airflow that is set slightly
warmer and with a lower rate of
airflowXTurn the SmartKey to position 2 in the
ignition lock.XPress the à button.XPress the ñ button repeatedly until the
desired climate mode appears in the
display.
Setting the temperature
Dual-zone automatic climate control
Different temperatures can be set for the
driver's and front-passenger sides.
XTurn the SmartKey to position 2 in the
ignition lock.XTo increase/reduce: turn controls : and
B clockwise or counter-clockwise
( Y page 119).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 † ).Operating the climate control system123Climate controlZ

iYou can use automatic climate control to
set the airflow in the rear compartment
separately.
Switching the ZONE function on/off
XTo switch on: press the á button.
The indicator lamp in the á button lights
up.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
not adopted for the front-passenger side.
3-zone automatic climate control: the
temperature setting for the driver's side is
not adopted for the front-passenger side
and the rear compartment.
When the buttons or controls for
temperature, airflow or air distribution are
activated, the temperature setting for the
driver's side is not adopted for the other
climate control zones.
XTo switch off: press the á button.
The indicator lamp in the á button goes
out.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side.
3-zone automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side and
the rear compartment.
Defrosting the windshield
You can use this function to defrost the
windshield or to defrost the inside of the
windshield and the side windows.
i You should only select the defrosting
function until the windshield is clear again.
XTurn the SmartKey to position 2 in the
ignition lock.XTo activate: press the ¬ button.
The indicator lamp in the ¬ button lights
up.
The climate control system switches to the
following functions:
R cooling with air dehumidification on
R high airflow 12
R high temperature 12
R air distribution to the windshield and
front side windows
R air-recirculation mode offXTo switch off: press the ¬ button.
The indicator lamp in the ¬ button goes
out. The previously selected settings come
into effect again. The cooling with air
dehumidification function remains on. Air-
recirculation mode remains deactivated.
or
XPress the à button.
The indicator lamp in the ¬ button goes
out. Airflow and air distribution are set to
automatic mode.
or
XTurn controls : or B clockwise or
counter-clockwise ( Y page 119),
( Y page 121).
or
XPress the K or I button.
MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA.
MAX COOL is only operational when the
engine is running.
12 Depending on the outside temperature.Operating the climate control system125Climate controlZ