2012 MERCEDES-BENZ G-CLASS SUV engine

When a fron
tdoor is opened, the front interior
lighting comes on. When arear door is
opened, the rear interior lighting comes on.
In addition, the courtesy lights come on.
i If a door remains open and the ignition
key is not in the ignition lock, the interior
lighting switches off automatically after
approximately 30 minutes.
Manual interior lighting control Front interior lighting
!
If the interior lighting has been switched
on manually, it will not be switched off
automatically.
This can cause the starter battery to dis-
charge.
Make sure that the interior lighting does
not remain switched on too long after the
engine has been switched off. Front overhead control panel
:
p Switches the left-hand fron treading
lamp on/off
; c Switches the front interior lighting
on
= t Switches the luggage compartment
lighting/rear interior lighting on/off
? | Switches the fron tinterior lighting/
automatic interio rlighting control off
A p Switches the right-hand reading
lamp on/off
B Switches the automatic interior lighting
control on X
To switch on: press thecsymbol on
rocker switch B.
X To switch off: set rocker switch Bto the
centre position.
Reading lamps Front overhead control panel
:
p Switches the left-hand front reading
lamp on/off
; c Switches the front interior lighting
on
= t Switches the luggage compartment
lighting/rear interior lighting on/off
? | Switches the front interior lighting/
automatic interior lighting control off
A p Switches the right-hand reading
lamp on/off
B Switches the automatic interior lighting
control on
X To activate/deactivate: press thep
button.
Luggage compartment lighting
! Do not close the rear door while lock :
is engaged at the bottom .Otherwise, you
could damage lock :.112
Interior lightingLights and
windscreen wipers

Courtesy lighting in the front doors
The courtesy light is switched on to help you
see bette rwhen it is dark.
X To switch on: activate the interior lighting
automatic control.
X Open the door.
X To switch off: close the door. Replacing bulbs
Important safety notes
Xenon bulbs G
DANGER
Xenon bulbs carry a high voltage. You could
get an electric shock and be seriously or even
fatally injured if you touch the electric con-
tacts on xenon bulbs. Therefore, never
remove the cover from xenon bulbs.
Do not change the xenon bulbs yourself, but
have them replaced at a qualified workshop.
If your vehicle is equipped with xenon bulbs,
you can recognise this by the following: the
cone of light from the xenon bulbs moves
from the top to the bottom and back again
when you start the engine. For this to be
observed, the lights must be switched on
before starting the engine.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly.
LED lamps You can neither replace xenon bulbs nor LED
bulbs. Have LED bulbs changed at a qualified
specialist workshop.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly. Other bulbs G
WARNING
Bulbs and lamps can be very hot. You should
therefore allow them to cool down before you
change them. Otherwise, you could be burned
if you touch them.
Keep bulbs out of the reach of children. Oth-
erwise, they could damage the bulbs, for
example, and injure themselves.
Never use a bulb which has been dropped.
Such a bulb may break or even explode and
injure you.
Halogen bulbs are pressurised and can
explode when you change them, particularly
if they are very hot. You should therefore wear
eye protection and gloves when you are
changing them.
There are bulbs other than the xenon bulbs
that you cannot replace. Replace only the
bulbs listed (Y page 115). Have the bulbs that
you cannot replace yourself changed at a
qualified specialist workshop.
If you require assistance replacing bulbs, con-
sult a qualified specialist workshop.
Do not touch the glass tube of new bulbs with
your bare hands. Even minor contamination
can burn into the glass surface and reduce
the service life of the bulbs. Always use a lint-
free cloth or only touch the base of the bulb
when fitting.
Only use bulbs of the correct type.
If the new bulb still does not light up, consult
a qualified specialist workshop.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly. 114
Replacing bulbsLights and windscreen wipers

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

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

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

back on as soon as ther
eis sufficient volt-
age. Switching the rear window heating
on/off
Switching on/off G
WARNING
Cleara ll windows of ice or snow before setting
off .O therwise, impaired visibility could
endanger you and others.
X Turn the key to position 2(Ypage 143) in
the ignition lock.
X USA only: press theªbutton.
The indicator lamp in the ªbutton lights
up or goes out.
i The rea rwindow heating has ahigh cur-
ren tdraw.Y ou should therefore switch it
off as soon as the window is clear. It only
switches itself off automatically after a few
minutes.
i If the battery voltage is too low, the rear
window heating may switch off.
Problems with the rear window heating If the indicator lamp in the
ªrear window
heating button flashes, the on-board voltage
is too low. The rear window heating has
switched off prematurely or cannot be acti-
vated.
X Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the battery is sufficiently charged,
the rear window heating is activated again
automatically. Activating/deactivating air-recircula-
tion mode
G
WARNING
Only switch over to air-recirculation mode
briefly at low outside temperatures. Other-
wise, the windows could mist up, thus impair-
ing visibility and endangering yourself and
others. This may prevent you from observing
the traffic conditions, thereby causing an
accident.
X Turn the key to position 2(Ypage 143) in
the ignition lock.
X To switch on: press thedbutton.
The indicator lamp in the dbutton lights
up.
i Air-recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures. When air-recir-
culation mode is activated automatically,
the indicator lamp in the dbutton is not
lit.
Outside air is added after approximately
30 minutes.
X To deactivate: press thedbutton.
The indicator lamp in the dbutton goes
out.
i Air-recirculation mode switches off auto-
matically:
R after approximately five minutes at out-
side temperatures below approximately
5 †
R after approximately five minutes if cool-
ing with air dehumidification is deactiva-
ted
R after approximately 30 minutes at out-
side temperatures above approximately
5 † Activating/deactivating the residual
heat function
It is possible to make use of the residual heat
of the engine to continue heating the station- Operating the climate control system
133Climate control Z

ary vehicle for up to 30 minutes after the
engine has been switched off
.The heating
time depends on the coolant temperature and
on the interior temperature that has been set.
i The blower will run at a low speed regard-
less of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated.
X Turn the key to position 0(Ypage 143) in
the ignition lock or remove it.
X To activate: press theÁbutton.
The indicator lamp in the Ábutton lights
up.
X To deactivate: press theÁbutton.
The indicator lamp in the Ábutton goes
out.
i Residual heat is deactivated automati-
cally:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R if the coolant temperature is too low Auxiliary heating
Important safety notes G
WARNING
Exhaust fumes are produced when the auxili-
ary heating is in operation. Inhaling these
exhaust fumes can be poisonous. You should
therefore switch off the auxiliary heating in
confined spaces without an extraction sys-
tem, e.g. a garage. G
WARNING
When operating the auxiliary heating parts of
the vehicle can get very hot. Make sure that
the exhaust system does not under any cir-
cumstances come into contact with easily
ignitable material such as dry grass or fuels.
The material could otherwise ignite and set the vehicle alight. Choose your parking spot
accordingly.
Operating the auxiliary heating is thus pro-
hibited at filling stations or when your vehicle
is being refuelled. You must therefore switch
off the auxiliary heating at filling stations.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for a longer
distance.
i Switch the auxiliary heating on regularly
once a month for approximately ten
minutes.
The auxiliary heating heats the air in the vehi-
cle interior without using the heat of the run-
ning engine. The auxiliary heating is operated
directly using the vehicle's fuel. For this rea-
son, the tank content must be at least at
reserve fuel level to ensure that the auxiliary
heating functions.
The auxiliary heating/ventilation automati-
cally adjusts to changes in temperature and
weather conditions. For this reason, the aux-
iliary heating could switch from ventilation
mode to heating mode or from heating mode
to ventilation mode.
You cannot use the auxiliary ventilation to
cool the vehicle interior to a temperature
lower than the outside temperature.
Before switching on X
Turn the key to position 2(Ypage 143) in
the ignition lock.
X Set the temperature.
The auxiliary heating/ventilation can be acti-
vated even when climate control is set to
manual. Optimum comfort can be attained
when the system is set to automatic mode.
Set the temperature to 22 †.
The auxiliary heating/ventilation can be acti-
vated or deactivated using the remote control
or the button on the centre console. 134
Operating the climate control systemClimate control

Problems with the auxiliary heating/ventilation
Display messages Possible causes/consequences and
M Solutions
$
FAIL The signal transmission between the transmitter and the vehicle
is faulty.
X
Change your position in relation to the vehicle, moving closer if
necessary.
X Make another attempt to switch the auxiliary heating on or off
using the remote control. FAIL
© This display message will only appear if you attempt to activate
the auxiliary heating.
there is not enough fuel in the fuel tank, or the auxiliary heating is
faulty.
X
Refuel at the nearest filling station.
X Make another attempt to switch on the auxiliary heating using
the remote control.
X Have the auxiliary heating checked at a qualified specialist
workshop. FAIL This display message may appear if you attempt to activate the
auxiliary heating or during a status query.
If the auxiliary heating does not switch on or has switched off while
running, this has occurred due to one of the following reasons:
R
the auxiliary heating was started more than twice when the
engine was switched off.
R the starter battery is not sufficiently charged.
R there is too little fuel in the fuel tank.
R the auxiliary heating is faulty.
If the auxiliary heating was switched on more than twice:
X Switch on the engine and let it run for more than 10 seconds.
X Make another attempt to switch on the auxiliary heating using
the remote control.
If the starter battery is not sufficiently charged:
X Charge the starter battery.
X Make another attempt to switch on the auxiliary heating using
the remote control.
If there is not enough fuel:
X Refuel at the nearest filling station.
X Make another attempt to switch on the auxiliary heating using
the remote control. 138
Operating the climate control systemClimate control