cooling MERCEDES-BENZ G-CLASS SUV 2012 Owners Manual

C
Cabriolet Draught stop .................................... 84
Soft top ............................................ 81
Tonnea ucover ................................. 85
Cabriole tsoft top
Cleaning ........................................ .297
Calling up a fault
see Display messages
Care
Automatic car wash .......................296
Cabriolet soft top ........................... 297
Chrome parts ................................. 299
Display ........................................... 300
Headlamps ..................................... 298
High-pressure cleaner .................... 296
Interior ........................................... 300
Matt paintwork .............................. 297
Notes ............................................. 295
Paint .............................................. 297
Plastic trim .................................... 300
Reversing camera ..........................299
Seat bel t........................................ 301
Seat covers .................................... 300
Sensors ......................................... 298
Tai lpipes ....................................... 299
Trailer coupling .............................. 299
Trim strips ..................................... 300
Wheels ........................................... 297
Windows ........................................ 298
Wiper blades .................................. 298
Wooden trim .................................. 300
CD player/CD changer(on-board
computer) .......................................... 218
Central locking Automatic locking (on-board com-
puter) ............................................. 223
Locking/unlocking (key ).................. 68
Centre console
Overview .......................................... 32
Uppe rsection .................................. 32
Changing bulbs
Important safety notes ..................114
Overview of bul btypes .................. 115
Parking lamps (front) .....................116
Reversing lamps ............................ 118Standing lamps
.............................. 116
Turn signals (front) ......................... 117
Changing gears .................................. 152
Checklist After driving off-roa d...................... 171
Before driving off-road ...................170
Child-proof locks
Important safety notes ....................59
Rea rdoors ....................................... 59
Children
In the vehicle ................................... 48
Restraint systems ............................ 48
Child seat
Automatic recognition .....................50
ISOFIX .............................................. 51
On the front-passenger sea t............ 49
Recommendations ...........................56
Suitable positions ............................ 54
Top Tether ....................................... 52
Troubleshooting ............................... 54
Chrome parts (cleaning instruc-
tions) .................................................. 299
Cigarette lighter ................................ 277
Climate control Auxiliary heating/ventilation .......... 126
Controlling automatically ...............130
Cooling with aird ehumidification..128
Demisting the windows .................. 132
Demisting the windscreen .............131
Important safety notes ..................124
Indicator lamp ................................ 130
Notes on using THERMATIC auto-
matic climate control .....................125
Overview of systems ......................124
Problems with "cooling with air
dehumidification" ........................... 130
Problem with the rear window
heating .......................................... 133
Setting the aird istribution.............131
Setting the airflow .........................131
Setting the airv ents...................... 139
Setting the temperature ................131
Switching air-recirculation mode
on/off ............................................ 133
Switching on/off ........................... 126
Switching residual hea ton/off ......133
Switching the rear window heat-
ing on/off ...................................... 1336
Index

Switching the ZONE function on/
off
.................................................. 131
THERMATIC automatic climate
control (2-zone) ............................. 125
Cockpit
Overview .......................................... 26
see Instrument cluster
COMAND
see Separate operating instructions
Combination switch ..........................108
Constant headlamp mode see Daytime driving lights
Consumption statistics (on-board
computer) .......................................... 215
Convenience opening feature see Side windows
Coolan t(engine)
Checkin gthe level ......................... 293
Display message ............................ 237
Notes ............................................. 347
Temperature (on-board computer) .225
Temperature gauge ........................ 212
Warning lamp ................................. 260
Cooling
see Climate control
Cornering light function
Function/notes ............................. 110
Courtesy lights .................................. 114
Cruise control Cruise control leve r....................... 174
Display message ............................ 245
Driving system ............................... 173
Selecting ........................................ 175
Cup holder
Centre console .............................. 275
Important safety notes ..................275
Rea rcompartmen t......................... 275 D
Data see Technical data
Daytime driving lights
Display message ............................ 236
Switching on/off (on-board com-
puter) ............................................. 222
Switching on/off (switch) ..............105Delaye
dswitch-off
Exterio rlighting (on-board com-
puter )............................................. 222
Interior lighting .............................. 222
Diagnostics connection ......................22
Diesel ................................................. .343
Diesel particle filter ..........................164
Differential locks ............................... 204
Digital speedometer .........................216
Dipped-beam headlamp Switching on/off ........................... 105
Dipped-beam headlamps
Display message ............................ 234
Setting for driving abroad (sym-
metrical) ........................................ 104
Display (cleaning instructions) ........300
Display message ASSYST service interval display .....294
General information .......................228
Hiding (on-board computer) ...........228
Display messages
Calling up (on-board computer) .....228
Driving systems ............................. 241
Engine ............................................ 237
Key ................................................ 251
Lights ............................................ .234
Safety systems .............................. 229
Tyres .............................................. 245
Vehicle .......................................... .248
Distance display (on-board com-
puter) ................................................. .220
Distance warning signal (warning
lamp) .................................................. 262
DISTRONIC PLUS Activating ....................................... 184
Activatio ncondition s..................... 184
Cruise control leve r....................... 183
Deactivating ................................... 188
Display message ............................ 243
Displays in the multifunctio ndis-
play ................................................ 187
Drivin gtips .................................... 189
Function/notes ............................. 182
Important safety notes ..................182
Selecting ........................................ 183
Setting the specified minimum
distance ......................................... 188
Warning lamp ................................. 262 Index
7

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. Country-specific differen-
ces are possible. Note that your vehicle
may not be fitted with all features descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 22). Overview of climate control systems
Important safety notes
G
WARNING
Observe the settings recommended on the
following pages. The windows could other-
wise mist up. This may preven tyou from
observing the traffic conditions, thereby caus-
ing an accident.
THERMATIC automatic climate control regu-
lates the temperature and the humidity in the
vehicle interior and filters undesirable sub-
stances from the air.
THERMATIC automatic climate control is only
operational when the engine is running. Opti-
mum operation is only achieved if you drive
with the side windows and sliding sunroof
closed.
The climatic comfor tdeteriorates whilst the
sliding sunroof is open. The automatic climate
control cannot maintain the set temperature
with the sliding sunroof open. You have to
adjust the climate control manually.
i The residual heat function can only be
activated or deactivated with the ignition
switched off.
i The residual heat function can only be
activated or deactivated with the ignition
switched off (Y page 133). i
Ventilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature (Y page 78). 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. Aclogged 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. 124
Overview of climate control systemsClimate control

Control panel for THERMATIC automatic climate control (2-zone)
:
To set the temperature, left (Y page 131)
; To demist the windscree n(Ypage 131)
= To switch the ZONE function on/off (Y page 131)
? To activate/deactivate cooling with air dehumidification (Y page 128)
A To switch the rear window heating on/off (Y page 133)
B To set the temperature, right (Y page 131)
C To activate/deactivate air-recirculation mode (Y page 133)
D To set the air distribution (Y page 131)
E To increase the airflow (Y page 131)
F To reduce the airflow (Y page 131)
G Display
H To switch climate control on/off (Y page 126)
I To set climate control to automatic mode (Y page 130)Information about using THERMATIC
automatic climate control
The following contains notes and recommen-
dations on optimum use of THERMATIC auto-
matic climate control.
R Activate climate contro lusing the Ãand
Á buttons. The indicator lamps in the
à andÁ buttons light up.
R Set the temperature to 22 †.
R Only use the demisting function briefly until
the windscreen is clear again. R
Only use the air-recirculation mode briefly,
e.g. if there are unpleasant outside odours
or when in a tunnel. The windows could
otherwise mist up, as no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the tem-
perature settings on the driver's side for
the front-passenger side as well.T he indi-
cator lamp in the ábutton goes out. Overview of climate control systems
125Climate control Z

Operating the climate control system
Switching climate control on/off
Points to observe before use i
If climate control is switched off, the air supply and air circulation are also switched off.
Only select this setting briefly. Otherwise, the windows may mist up.
Switching the air conditioning on :
To set the temperature, left (Y page 131)
; To demist the windscreen (Y page 131)
= To switch the ZONE function on/off (Y page 131)
? To activate/deactivate cooling with air dehumidification (Y page 128)
A To switch the rear window heating on/off (Y page 133)
B To set the temperature, right (Y page 131)
C To activate/deactivate air-recirculation mode (Y page 133)
D To set the air distribution (Y page 131)
E To increase the airflow (Y page 131)
F To reduce the airflow (Y page 131)
G Display
H To switch climate control on/off (Y page 126)
I To set climate control to automatic mode (Y page 130)126
Operating the climate control systemClimate control

X
Turn the key to position 2(Ypage 143) in the ignition lock.
X Press the Ãbutton.
The indicator lamp in the Ãbutton lights up. Airflow and air distribution are set to auto-
matic mode.
or
X Press the ^button.
The indicator lamp in the ^button goes out. The previous settings are reactivated.
Switching the climate control off :
To set the temperature, left (Y page 131)
; To demist the windscreen (Y page 131)
= To switch the ZONE function on/off (Y page 131)
? To activate/deactivate cooling with air dehumidification (Y page 128)
A To switch the rear window heating on/of f(Ypage 133)
B To set the temperature, right (Y page 131)
C To activate/deactivate air-recirculation mode (Y page 133)
D To set the air distribution (Y page 131)
E To increase the airflow (Y page 131)
F To reduce the airflow (Y page 131)
G Display
H To switch climate control on/off (Y page 126)
I To set climate control to automatic mode (Y page 130)
X Press the ^button.
The indicator lamp in the ^button lights up. Operating the climate control system
127Climate control Z

Activating/deactivating the cooling with air dehumidification function
Points to observe before use G
WARNING
If the "cooling with air dehumidification" function is deactivated, the air inside the vehicle will not
be cooled (during warm weather) or dehumidified. The windows could mis tup more quickly. This
may prevent you from observing the traffic conditions, thereby causing an accident.
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.
Condensation may drip from the underside of the vehicle when cooling mode is active. This
is normal and not a sign that there is a malfunction.
i The cooling with air dehumidification function uses refrigerant R134a. This refrigerant does
not contain chlorofluorocarbons, and therefore does not damage the ozone layer.
Activating the cooling with air dehumidification function :
To set the temperature, left (Y page 131)
; To demist the windscreen (Y page 131)
= To switch the ZONE function on/off (Y page 131)
? To activate/deactivate cooling with air dehumidification (Y page 128)
A To switch the rear window heating on/off (Y page 133)
B To set the temperature, right (Y page 131)
C To activate/deactivate air-recirculation mode (Y page 133)
D To set the air distribution (Y page 131)
E To increase the airflow (Y page 131)
F To reduce the airflow (Y page 131)
G Display 128
Operating the climate control systemClimate control

H
To switch climate control on/off (Y page 126)
I To set climate control to automatic mode (Y page 130)
X Press the Ábutton.
The indicator lamp in the Ábutton lights up.
Deactivating the cooling with air dehumidification function :
To set the temperature, left (Y page 131)
; To demist the windscreen (Y page 131)
= To switch the ZONE function on/off (Y page 131)
? To activate/deactivate cooling with air dehumidification (Y page 128)
A To switch the rear window heating on/of f(Ypage 133)
B To set the temperature, right (Y page 131)
C To activate/deactivate air-recirculation mode (Y page 133)
D To set the air distribution (Y page 131)
E To increase the airflow (Y page 131)
F To reduce the airflow (Y page 131)
G Display
H To switch climate control on/off (Y page 126)
I To set climate control to automatic mode (Y page 130)
X Press the Ábutton.
The indicator lamp in the Ábutton goes out. The cooling with air dehumidification func-
tion has a delayed switch-of ffeature. Operating the climate control system
129Climate control Z

Problems with the cooling with air dehumidification function
:
To set the temperature, left (Y page 131)
; To demist the windscreen (Y page 131)
= To switch the ZONE function on/off (Y page 131)
? To activate/deactivate cooling with air dehumidification (Y page 128)
A To switch the rear window heating on/off (Y page 133)
B To set the temperature, right (Y page 131)
C To activate/deactivate air-recirculation mode (Y page 133)
D To set the air distribution (Y page 131)
E To increase the airflow (Y page 131)
F To reduce the airflow (Y page 131)
G Display
H To switch climate control on/off (Y page 126)
I To set climate control to automatic mode (Y page 130)
When you press the Ábutton, the indicator lamp in the button flashes three times or
remains off. You can no longer switch on the cooling with air dehumidification function.
X Visit a qualified specialist workshop. Setting climate control to automatic
mode
In automatic mode, the set temperature is
maintained at a constant level. The system
automatically regulates the temperature of
the dispensed air, the airflow and the air dis-
tribution. Automatic mode will achieve optimal opera-
tion if cooling with air dehumidification is also
activated. If desired, cooling with air dehu-
midification can be deactivated.130
Operating the climate control systemClimate control

The climate control system switches to the
following functions:
R
cooling with air dehumidification (only
with engine running)
R high airflow (depending on the outside
temperature)
R high temperature (depending on the out-
side temperature)
R air distribution to the windscreen and
fronts ide windows
R air-recirculation mode off
X To deactivate: press the¬button.
The indicator lamp in the ¬button goes
out. The previous settings are reactivated.
The cooling with air dehumidification func-
tion remains on. Air-recirculation mode
remains deactivated.
or
X Press the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
or
X Turn controls :orB clockwise or anti-
clockwise (Y page 125).
or
X Press the KorI button. Demisting the windows
Windows misted up on th einside X
Activate the Ácooling with air dehu-
midification function.
X Activate automatic mode Ã.
X If the windows continue to mist up, activate
the demisting function (Y page 131).
i You should only select this setting until
the windscreen is clear again. Windows misted up on the outside X
Switch on the windscreen wipers
(Y page 119).
X Press the _button repeatedly until the
P orO symbol appears in the dis-
play.
i You should only select this setting until
the windscreen is clear again. Switching the windscreen heating
on/off
X
Turn the key to position 2(Ypage 143) in
the ignition lock.
X To switch on: press button;.
Indicator lamp :lights up.
X To switch off: press button;.
Indicator lamp :goes out.
i At outside temperatures above 10 †, the
windscreen heating cannot be activated.
Indicator lamp :lights up briefly when you
attempt to activate it and then goes out
again.
i The windscreen heating has a high cur-
rent draw. You should therefore switch it
off as soon as the windscreen is clear. The
windscreen heating otherwise switches
itself off automatically after 10 minutes.
i If the battery voltage is too low, the wind-
screen heating may switch off. If the wind-
screen heating is automatically deactiva-
ted, indicator lamp :flashes. The wind-
screen heating will automatically switch 132
Operating the climate control systemClimate control