2018 MERCEDES-BENZ G-CLASS Owner's Manual

XMake sure that wiper blade;is seated cor-
rectly.
XFold wiper arm :back onto the windshield.
Problems with the windshield wipers
ProblemPossible causes/consequences and MSolutions
The windshield wipers
are jammed.Leaves or snow, for example, are obstructing windshield wiper move-
ment. The wiper motor has been deactivated.
XSwitch off the engine.
XRemove the SmartKey from the ignition lock.
XRemove the cause of the obstruction.
XSwitch the windshield wipers back on.
The windshield wipers
fail completely.The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the combination switch.
XHave the windshield wipers checked at a qualified specialist work-
shop.
The windshield washer
fluid from the spray noz-
zles no longer hits the
center of the windshield.The spray nozzles are misaligned.
XHave the spray nozzles adjusted at a qualified specialist workshop.
Windshield wipers95
Lights and windshield wipers
Z

Overview of the climate control sys-
tem
General notes
Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To prevent the windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only briefly
Rswitch on the cooling with air dehumidifica-
tion function
Ractivate the "Windshield defrosting" function
briefly, if required
Climate control regulates the temperature and
the humidity in the vehicle interior and filters
undesirable substances out of the air.
The "Cooling with air dehumidification" function
is only available when the engine is running.
Optimum operation is only achieved when the
side windows and the sliding sunroof are closed. The climatic comfort deteriorates whilst the slid-
ing sunroof is open. Set the temperature man-
ually if the sliding sunroof is open.
The residual heat function can only be activated
or deactivated with the ignition switched off
(
Ypage 102).
The integrated filter can filter out most particles
of dust and completely filters out pollen. A clog-
ged filter reduces the amount of air supplied to
the vehicle interior. Depending on the operating
conditions and environmental influences, the
interval for replacing the filter may be shorter
than specified.
iVentilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature (
Ypage 70). This will speed
up the cooling process and the desired vehi-
cle interior temperature will be reached more
quickly.
Control panel for dual-zone automatic climate control
Control panel (Canada only)
:
Sets the temperature, left (Ypage 99)
;Defrosts the windshield (Ypage 100)
=Switches the ZONE function on/off (Ypage 100)
?Switches cooling with air dehumidification on/off (Ypage 98)
Switches the residual heat on/off (
Ypage 102)
ASwitches the rear window defroster on/off (Ypage 101)
BSets the temperature, right (Ypage 99)
96Overview of the climate control system
Climate control

CActivates/deactivates air-recirculation mode (Ypage 102)
DSets the air distribution (Ypage 99)
EIncreases the airflow (Ypage 99)
FReduces the airflow (Ypage 99)
GSwitches the climate control on/off (Ypage 98)
HDisplay
ISets climate control to automatic (Ypage 99)
Control panel (USA only)
:
Sets the temperature, left (Ypage 99)
;Defrosts the windshield (Ypage 100)
=Switches the maximum cooling MAX COOL on/off (Ypage 100)
?Switches cooling with air dehumidification on/off (Ypage 98)
ASwitches the rear window defroster on/off (Ypage 101)
BSets the temperature, right (Ypage 99)
CActivates/deactivates air-recirculation mode (Ypage 102)
DSets the air distribution (Ypage 99)
EIncreases the airflow (Ypage 99)
FReduces the airflow (Ypage 99)
GSwitches the climate control on/off (Ypage 98)
HDisplay
ISets climate control to automatic (Ypage 99)
Optimum use of dual-zone climate
control
Optimum use of the automatic climate
control
The following contains notes and recommenda-
tions on optimum use of dual-zone climate con-
trol.
RYou can switch on climate control by using the
à and¿ orà andÁ buttons.
The indicator lamps in the Ãand¿ or
à andÁ buttons light up.
RSet the temperature to 72 ‡ (22 †).
ROnly use the "Windshield defrosting" function
briefly until the windshield is clear again.
ROnly use air-recirculation mode briefly, e.g. if
there are unpleasant outside odors or when in
a tunnel. The windows could otherwise fog up,
Overview of the climate control system97
Climate control

since no fresh air is drawn into the vehicle in
air-recirculation mode.
ECO start/stop function
During automatic engine switch-off, the climate
control system only operates at a reduced capa-
city. If you require the full climate control output,
you can switch off the ECO start/stop function
by pressing the ECO button (
Ypage 108).
Operating the climate control system
Activating/deactivating climate con-
trol
General notes
When the climate control is switched off, the air
supply and air circulation are also switched off. The windows could fog up. Therefore, switch off
climate control only briefly.
Activate climate control primarily using the
Ã
button (
Ypage 99).
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to auto-
matic mode.
XTo deactivate: press the^button.
The indicator lamp in the ^button lights
up.
Switching cooling with air dehumidification on/off
General notes
If you deactivate the "Cooling with air-dehumidification" function, the air inside the vehicle will not
be cooled. The air inside the vehicle will also not be dehumidified. The windows can fog up more
quickly. Therefore, only deactivate the "Cooling with air-dehumidification" function briefly.
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 it is in cooling mode. This is normal
and not a sign that there is a malfunction.
Activating/deactivating
XTo activate: press the¿orÁ button.
The indicator lamp in the ¿orÁ button lights up.
XTo deactivate: press the¿orÁ button.
The indicator lamp in the ¿orÁ button goes out. The "Cooling with air dehumidification"
function has a delayed switch-off feature.
Problems with the "Cooling with air dehumidification" function
!If the cooling with air dehumidification does not switch on, it is possible that the climate control
system has lost coolant.
Have the cooling with air dehumidification checked at a qualified specialist workshop.
98Operating the climate control system
Climate control

ProblemPossible causes/consequences andMSolutions
The indicator lamp in the
¿orÁ button
flashes three times or
remains off. The "Cool-
ing with air dehumidifi-
cation" function cannot
be switched on.Cooling with air dehumidification has been deactivated due to a mal-
function.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
In automatic mode, the set temperature is main-
tained at a constant level. The system automat-
ically regulates the temperature of the dis-
pensed air, the airflow and the air distribution.
Automatic mode works best when cooling with
air dehumidification is also activated. If neces-
sary, cooling with air dehumidification can be
deactivated.
Automatic control
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XSet the desired temperature.
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow are
activated.
XTo deactivate: press the_button.
or
XPress the IorK button.
The indicator lamp in the Ãbutton goes
out.
XTo switch to manual mode: press the_
button.
Setting the temperature
Different temperatures can be set for the driv-
er's and front-passenger sides.
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XAdjust control :orB (Ypage 96) to the
desired temperature.
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
Setting the air distribution
Air distribution settings
P Directs air through the center and side air
vents
O Directs air through the footwell air vents
S Directs air through the center, side and
footwell vents
¯ Directs air through the defroster vents
b Canada only: directs the airflow through
the defroster, center and side air vents.
a Directs air through the defroster and
footwell vents
_ Canada only: directs the airflow through
the defroster, center and footwell air
vents.
Setting
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XPress the _button repeatedly until the
desired symbol appears in the display.
Setting the airflow
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XTo increase: press theKbutton.
XTo reduce: press theIbutton.
iThe airflow from the rear-compartment
vents and the center vents is the same.
Operating the climate control system99
Climate control

Switching the ZONE function on/off
XTo switch on:press theábutton.
The indicator lamp in the ábutton lights
up.
The temperature setting for the driver's side
is not adopted for the front-passenger side
and the rear compartment. The temperature
for the front-passenger side and the rear com-
partment is set separately.
XTo switch off: press theábutton.
The indicator lamp in the ábutton goes
out.
The temperature setting for the driver's side
is adopted for the front-passenger side and
the rear compartment.
Defrosting the windshield
General notes
You can use this function to defrost the wind-
shield or to defrost the inside of the windshield
and the side windows.
Switch off the "Windshield defrosting" function
as soon as the windshield is clear again.
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XTo activate: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
Rcooling with air dehumidification on
Rhigh airflow
Rhigh temperature
Rair distribution to the windshield and front
side windows
Rair-recirculation mode off
XTo deactivate: press the¬button.
The indicator lamp in the ¬button goes
out. The previously selected settings are
restored. The cooling with air dehumidifica-
tion function remains on. Air-recirculation
mode remains deactivated.
Activating/deactivating MAX COOL
maximum cooling
The MAX COOL function is only available in vehi- cles for the USA.
MAX COOL is only operational when the engine
is running.
XTo activate: press theÙbutton.
The indicator lamp in the button lights up.
XTo deactivate: press theÙbutton.
The indicator lamp in the Ùbutton goes
out. The previously selected settings are
restored.
When you activate MAX COOL, the following
functions are also switched on:
Rmaximum cooling
Rmaximum airflow
Rair-recirculation mode
Defrosting the windows
Windows fogged up on the inside
XActivate the Ácooling with air dehumidi-
fication function.
XActivate the Ãautomatic mode.
XIf the windows continue to fog up, activate the
"Windshield defrosting" function
(
Ypage 100).
iYou should only select this setting until the
windshield is clear again.
Windows fogged up on the outside
XSwitch on the windshield wipers (Ypage 93).
XPress the _button repeatedly until the
P orO symbol appears in the display.
iYou should only select this setting until the
windshield is clear again.
iIf you clean the windows regularly, they do
not fog up so quickly.
100Operating the climate control system
Climate control

Activating/deactivating windshield
heating
XTurn theSmartKey to position 2
(Ypage 105) in th eignition loc k .
XTo activate: press button;.
Indicato rlamp :lights up.
XTo deactivate: press button;.
Indicato rlamp :goe sout . At outside temperatures abov
e50 ‡(10 †) the
windshield heating cannot be switched on. Indi-
cator lamp :lights up briefly when you attempt
to activate it and then goes out again.
The windshield defroster has a high current
draw. You should therefore switch it off as soon
as the windshield is clear. Otherwise, the wind-
shield heating switches off automatically after
ten minutes.
When the windshield heating is switched on for
the fourth time in a row, windshield heating
switches off automatically after five minutes.
Indicator lamp :flashes if too many electrical
consumers are switched on at the same time
when the battery voltage is low. After approx-
imately 30 seconds the windshield heating
switches off automatically.
Switching the rear window defroster on/off
General notes
The rear window defroster has a high current draw. You should therefore switch it off as soon as the
rear window is clear. Otherwise, the rear window defroster switches off automatically after several
minutes.
If the battery voltage is too low, the rear window defroster may switch off.
Activating/deactivating
XTurn the SmartKey to position 2in the ignition lock (Ypage 105).
XPress the ¤button.
The indicator lamp in the ¤button lights up or goes out.
Problems with the rear window defroster
ProblemPossible causes/consequences and MSolutions
The indicator lamp in the
¤button flashes.The on-board voltage is too low.
XSwitch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.The battery has not been sufficiently charged.
XSwitch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
Operating the climate control system101
Climate control

Switching air-recirculation mode
on/off
General notes
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XTo activate: press thedbutton.
The indicator lamp in the dbutton lights
up.
iAir-recirculation mode is automatically acti-
vated at high levels of pollution or at high out-
side temperatures. When air-recirculation
mode is activated automatically, the indicator
lamp in the dbutton is not lit.
Outside air is added after about 30 minutes.
XTo deactivate: press thedbutton.
The indicator lamp in the dbutton goes
out.
iAir-recirculation mode switches off auto-
matically:
Rafter approximately five minutes at outside
temperatures below approximately 41 ‡
Rafter approximately five minutes if cooling
with air dehumidification is deactivated
Rafter approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †)
Switching the residual heat on or off
General notes
The residual heat function is only available on
vehicles for Canada.
It is possible to make use of the residual heat of
the engine to continue heating the stationary
vehicle for up to 30 minutes after the engine has
been switched off. The heating time depends on the set interior temperature.
Activating/deactivating
XTurn the SmartKey to position gin the igni-
tion lock (Ypage 105) or remove it.
XTo activate: press theÁbutton.
The indicator lamp in the Ábutton lights
up.
iThe blower will run at a low speed regardless
of the airflow setting.
iIf you activate the residual heat function at
high temperatures, only the ventilation will be
activated.
XTo deactivate: press theÁbutton.
The indicator lamp in the Ábutton goes
out.
Residual heat is deactivated automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Rif the coolant temperature is too low
Air vents
Important safety notes
GWARNING
Very hot or very cold air can flow from the air
vents. This could result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
Rkeep the air inlet between the windshield and
the hood free of blockages, such as ice, snow or leaves.
Rnever cover the air vents or air intake grilles in
the vehicle interior.
iFor virtually draft-free ventilation, adjust the
sliders of the air vents to the center position.
iIf the automatic climate control constantly
differs from the set temperature or if unde-
102Air vents
Climate control