cooling MERCEDES-BENZ G-CLASS SUV 2013 User Guide

USA only
0043
Sets the temperature, left ( Y page 131)
0044 Defrosts the windshield ( Y page 131)
0087 Switches maximum cooling MAX COOL on/off ( Y page 132)
0085 Activates/deactivates cooling with air dehumidification ( Y page 124)
0083 Switches the rear window defroster on/off ( Y page 133)
0084 Sets the temperature, right ( Y page 131)
006B Activates/deactivates air-recirculation mode (Y page 134)
006C Sets the air distribution (Y page 131)
006D Increases the airflow ( Y page 131)
006E Reduces the airflow ( Y page 131)
006F Display
0070 Switches climate control on/off ( Y page 121)
0071 Sets climate control to automatic (Y page 130)
X Press the 0056 button.
The indicator lamp in the 0056 button lights up.126
Operating the climate control systemsClimate control

Deactivating the cooling with air dehumidification function
Canada only
0043
Sets the temperature, left ( Y page 131)
0044 Defrosts the windshield ( Y page 131)
0087 Switches the ZONE function on/off ( Y page 131)
0085 Activates/deactivates cooling with air dehumidification ( Y page 124)
0083 Switches the rear window defroster on/off ( Y page 133)
0084 Sets the temperature, right ( Y page 131)
006B Activates/deactivates air-recirculation mode (Y page 134)
006C Sets the air distribution (Y page 131)
006D Increases the airflow ( Y page 131)
006E Reduces the airflow ( Y page 131)
006F Display
0070 Switches climate control on/off ( Y page 121)
0071 Sets climate control to automatic (Y page 130)
X Press the 0056 button.
The indicator lamp in the 0056 button goes out. The cooling with air dehumidification
function has a delayed switch-off feature. Operating the climate control systems
127Climate control Z

USA only
0043
Sets the temperature, left ( Y page 131)
0044 Defrosts the windshield ( Y page 131)
0087 Switches maximum cooling MAX COOL on/off ( Y page 132)
0085 Activates/deactivates cooling with air dehumidification ( Y page 124)
0083 Switches the rear window defroster on/off ( Y page 133)
0084 Sets the temperature, right ( Y page 131)
006B Activates/deactivates air-recirculation mode (Y page 134)
006C Sets the air distribution (Y page 131)
006D Increases the airflow ( Y page 131)
006E Reduces the airflow ( Y page 131)
006F Display
0070 Switches climate control on/off ( Y page 121)
0071 Sets climate control to automatic (Y page 130)
X Press the 0056 button.
The indicator lamp in the 0056 button goes out. The cooling with air dehumidification
function has a delayed switch-off feature. 128
Operating the climate control systemsClimate control

Problems with the cooling with air dehumidification function
Canada only
0043
Sets the temperature, left ( Y page 131)
0044 Defrosts the windshield ( Y page 131)
0087 Switches the ZONE function on/off ( Y page 131)
0085 Activates/deactivates cooling with air dehumidification ( Y page 124)
0083 Switches the rear window defroster on/off( Y page 133)
0084 Sets the temperature, right ( Y page 131)
006B Activates/deactivates air-recirculation mode (Y page 134)
006C Sets the air distribution (Y page 131)
006D Increases the airflow ( Y page 131)
006E Reduces the airflow ( Y page 131)
006F Display
0070 Switches climate control on/off ( Y page 121)
0071 Sets climate control to automatic (Y page 130)
When you press the 0056 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.
X Visit a qualified specialist workshop. Operating the climate control systems
129Climate control Z

USA only
0043
Sets the temperature, left ( Y page 131)
0044 Defrosts the windshield ( Y page 131)
0087 Switches maximum cooling MAX COOL on/off ( Y page 132)
0085 Activates/deactivates cooling with air dehumidification ( Y page 124)
0083 Switches the rear window defroster on/off( Y page 133)
0084 Sets the temperature, right ( Y page 131)
006B Activates/deactivates air-recirculation mode (Y page 134)
006C Sets the air distribution (Y page 131)
006D Increases the airflow ( Y page 131)
006E Reduces the airflow ( Y page 131)
006F Display
0070 Switches climate control on/off ( Y page 121)
0071 Sets climate control to automatic (Y page 130)
When you press the 0056 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.
X Visit a qualified specialist workshop. Setting climate control to automatic
G
WARNING
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 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.130
Operating the climate control systems
Climate control

X
Turn the SmartKey to position
2 (Y page 139) in the ignition lock.
X To activate: press the 0064 button.
The indicator lamp in
the 0064 button lights
up.
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
outside temperature)
R air distribution to the windshield and
front side windows
R air-recirculation mode off
X To deactivate: press the 0064 button.
The indicator lamp in

the 0064 button goes
out. The previously selected settings are
restored. The cooling with air
dehumidification function remains on. Air-
recirculation mode remains deactivated.
or
X Press the 0058 button.
The indicator lamp in

the 0064 button goes
out. Airflow and air distribution are set to
automatic mode.
or
X Turn controls 0043 or 0084 clockwise or
counter-clockwise ( Y page 119).
or
X Press the 0097 or 0095 button. Activating/deactivating 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.
X
To activate: press the 00C9 button.
The indicator lamp in the button lights up.
X To activate: press off-road button 00C9
again.
The indicator lamp goes

out. The previously
selected settings are restored.
When you activate MAX COOL, climate
control switches to the following functions:
R maximum cooling
R maximum airflow
R air-recirculation mode on Defrosting the windows
Windows fogged up on the inside X
Activate the 0056 cooling with air
dehumidification function.
X Activate automatic mode 0058.
X If the windows continue to fog up, activate
the defrosting function (Y page 131).
i You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside X
Switch on the windshield wipers
(Y page 114).
X Press the 008F button repeatedly until the
009C or 009B symbol appears in the
display. 132
Operating the climate control systems
Climate control

Activating/deactivating air-
recirculation mode
G
WARNING
Fogged windows impair visibility,
endangering 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 is activated, or press the 0064
button.
X Turn the SmartKey to position
2 (Y page 139) in the ignition lock.
X To switch on: press the 0089 button.
The indicator lamp
in
the 0089 button lights
up.
i Air-recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures. When air-
recirculation mode is activated
automatically, the indicator lamp in the
0089 button is not lit.
Outside air is added after approximately
30 minutes.
X To deactivate: press the 0089 button.
The indicator lamp in

the 0089 button goes
out.
i Air-recirculation mode switches off
automatically:
R after approximately five minutes at
outside temperatures below
approximately 41 ‡
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes at
outside temperatures above
approximately 41 ‡ (5 †) Activating/deactivating the residual
heat function
The "residual heat" function is only available
in 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 coolant temperature and
on the interior temperature that has been set.
i The blower will run at a low speed
regardless of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated.
X Turn the SmartKey to position
0(Y page 139) in the ignition lock or
remove it.
X To activate: press the 0056 button.
The indicator lamp
in

the 0056 button lights
up.
X To deactivate: press the 0056 button.
The indicator lamp in

the 0056 button goes
out.
i Residual heat is deactivated
automatically:
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 Setting the air vents
Important safety notes
G
WARNING
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the

set temperature). This
could cause burns or frostbite to unprotected
skin in the immediate area of the air vents. 134
Setting the air vents
Climate control

Problem Possible causes/consequences and
0050 Solutions00AC
The red coolant
warning lamp comes
on
while the engine is
running. The coolant level is too low.
!
Avoid making long
journeys
with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
If the coolant level is correct, the airflow to the engine radiator
may be blocked or the electric engine radiator fan may be
malfunctioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Apply the parking brake.
X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant, observing the warning
notes (Y page 291).
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the coolant temperature is
below 248 ‡ (120

†). Otherwise, the engine could be damaged.
X Drive to the nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-start driving. 00AC
The red coolant
warning lamp comes
on
while the engine is
running.

A warning tone
also sounds. The coolant temperature has exceeded 248 ‡ (120 †). The
airflow
to the
engine
radiator may be blocked or the coolant level
may be too low.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when
your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury. Warning and indicator lamps in the instrument cluster
257
On-board computer and displays Z

Adding engine oil
H
Environmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful
to the environment.
! Only use engine oils and oil filters that
have been approved for vehicles with a
service system. You can
obtain a list of the
engine oils and oil filters tested and
approved in accordance with the
Mercedes-Benz Specifications for Service
Products at any Mercedes-Benz Service
center.
Damage to the engine or exhaust system is
caused by the following:
R using engine oils and oil filters that have
not been specifically approved for the
service system
R replacing engine oil and oil filters after
the interval for replacement specified by
the service system has been exceeded
R using engine oil additives.
! Do not add too much oil. If the oil level is
above the "max" mark on the dipstick, too
much oil has been added. This can lead to
damage to the engine or the catalytic
converter. Have excess oil siphoned off. Example: engine oil cap
X
Turn cap 0043 counter-clockwise and remove
it.
X Add the amount of oil required. Observe the specifications in the on-board
computer
when doing
so

or fill carefully to the
maximum mark on the oil dipstick.
Further information on engine oil
(Y page 353).
i The difference between the minimum
mark and the maximum mark on the oil
dipstick is approximately 2.1 US qt (2 l).
X Replace cap 0043 on the filler neck and
tighten clockwise.
Ensure that the cap locks into place
securely. Additional service products
Checking the coolant level G
WARNING
In order to avoid potentially serious burns:
R use extreme caution when opening the
hood if there are any signs of vapor or
coolant leaking from the

cooling system, or
if the coolant temperature display indicates
that the coolant is overheated.
R do not remove the pressure cap on the
coolant tank if the coolant temperature is
above 158 ‡ (70 †). Allow the engine to
cool down before removing the cap. The
coolant tank contains hot fluid and is under
pressure.
R using a cloth, slowly turn the cap
approximately 00C5 turn to relieve excess
pressure. If you open the cap immediately,
pressurized scalding hot fluid and vapor will
be blown out.
R do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. Engine compartment
291
Maintenance and care Z

http://bevo.mercedes-benz.com. Or
contact a qualified specialist workshop.
! Always use a suitable coolant mixture,
even in countries where
high temperatures
prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
The coolant is a mixture of water and
antifreeze/corrosion inhibitor. It performs
the following tasks:
R corrosion protection
R antifreeze protection
R raising the boiling point
If the coolant has antifreeze protection down
to -35 ‡ (-37 †), the boiling point of the
coolant in the pressure system is
approximately 266 ‡ (130 †).
The antifreeze/corrosion inhibitor
concentration in the engine cooling system
should:
R be at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35 ‡ (-37 †).
R not exceed 55% (antifreeze protection
down to -49 ‡ [-45 †]). Otherwise, heat
will not be dissipated as effectively.
If the vehicle has lost coolant, add equal
amounts of water and antifreeze/corrosion
inhibitor. Mercedes-Benz recommends an
antifreeze/corrosion inhibitor in accordance
with MB Specifications for Service Products
310.1.
The coolant is checked with every
maintenance interval at a qualified specialist
workshop.
i When the vehicle is first delivered, it is
filled with a coolant mixture that ensures
adequate antifreeze and corrosion
protection.
The engine cooling system is filled with
coolant at the factory; this coolant contains
antifreeze/corrosion inhibitor that ensures protection down to approximately -35 ‡
(-37 †).
Your vehicle has a range of aluminum
components. Aluminum components in the
engine make it necessary to use antifreeze/
corrosion inhibitor that has been specifically
formulated to protect the aluminum parts.
Using other antifreeze/corrosion inhibitors
without these characteristics affects the
service life.
The coolant must be
used throughout the year
in order to maintain the necessary corrosion
protection and to provide protection from
overheating. In the Maintenance Booklet, you
can find information on the intervals for
renewal.
The renewal interval is determined by the
coolant type and the engine cooling system
design. The renewal interval in the
Maintenance Booklet is only valid if the
coolant is renewed or added to with
Mercedes-Benz approved products.
Therefore, only use MB 326.0 antifreeze/
corrosion inhibitor or another Mercedes-Benz
approved product of the same specification.
Information on other products with the same
specifications that are approved by
Mercedes-Benz can be obtained at an
authorized Mercedes-Benz Center or on the
Internet at
http://bevo.mercedes-benz.com.
If the coolant level is too low, MB 325.0
antifreeze/corrosion inhibitor should be
added. Have the engine cooling system
checked for possible leaks. Service products and filling capacities
355
Technical data Z