2009 MERCEDES-BENZ GL SUV ignition

Thermotronic multi-zone luxury automatic climate control*
Front control unit
Rear control panel* Thermotronic multi-zone luxury automatic
climate control combines an automatic heat-
ing and ventilation system with a cooling sys-
tem. The temperature and air distribution
can be adjusted separately for the driver's
and front-passenger side as well as for the
rear compartment. You can control the air-
flow separately for the front and rear com-
partments. General notes
Thermatic 2-zone automatic climate control/
Thermotronic luxury multi-zone automatic cli-
mate control* controls the temperature and
the humidity of the vehicle interior and filters
out undesirable substances from the air.
Thermatic 2-zone automatic climate control/
Thermotronic luxury multi-zone automatic cli-
mate control* is only operational when the
engine is running. 25
Optimum operation is
only achieved when you drive with the side
windows and sliding/tilting sunroof* closed.
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience 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. G
Risk of accident
Observe the recommended settings on the
following pages. Otherwise, the windows
could mist up. This may prevent you from
observing the traffic conditions, thereby caus-
ing an accident.
25 The "residual heat" function can only be switched on/off when the ignition is switched off. Air conditioning
137Controls
* optional
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Overview of air-conditioning system functions
Thermatic 2-zone automatic climate control Function
:
Sets the temperature, left
;
Sets the air-conditioning system to
automatic
=
Demists the windscreen
?
Increases the airflow
A
Directs the airflow through the
demister vents
B
Switches cooling with air dehumid-
ification on/off
Switches the residual heat function
on/off
C
Sets the temperature, right
D
Switches the rear-compartment air
conditioning on/off
E
Directs the airflow through the
centre and side air vents
F
Directs the airflow to the footwells
and side air vents
G
Displays the airflow level
H
Reduces the airflow
I
Switches the rear window heating
on/off Function
J
Activates/deactivates air-recircu-
lation mode
K
Interior temperature sensor
L
Switches the air conditioning on/
off
i
Instructions and recommendations for
optimum air conditioning:
R activate the air conditioning using
the à andÁ buttons. The indica-
tor lamps in the ÃandÁ buttons
come on.
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 out-
side odours or when in a tunnel. Other-
wise, the windows could mist up due to
a lack of fresh air.
R use the "residual heat" function if you
want to heat or ventilate the vehicle inte-
rior when the ignition is switched off. The
"residual heat" function can only be acti-
vated or deactivated with the ignition
switched off. 138
Air conditioningControls
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Function
Q
Increases the airflow
R
Sets the temperature
S
Controls the rear-compartment air
conditioning automatically
T
Directs the airflow through the rear
air vents
U
Directs the airflow through the foot-
well vents
V
Switches the rear-compartment air
conditioning on/off
W
Reduces the airflow
i
Instructions and recommendations for
optimum air conditioning:
R activate the air conditioning using
the à andÁ buttons. The indica-
tor lamps in the ÃandÁ buttons
come on.
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 out-
side odours or when in a tunnel. Other-
wise, the windows could mist up due to
a lack of fresh air.
R use the "residual heat" function if you
want to heat or ventilate the vehicle inte-
rior when the ignition is switched off. The
"residual heat" function can only be acti-
vated or deactivated with the ignition
switched off.
R use the "MONO" function if you want to
adopt the temperature, air distribution
and airflow settings from the driver's side
for all air-conditioning zones. The indica-
tor lamp in the ºbutton comes on. Switching the air conditioning on/off
i When the air conditioning is switched off,
the air supply and air circulation are also
switched off. Only select this setting briefly,
otherwise the windows may mist up.
i Activate the air conditioning primarily
using the Ãbutton (Y page 141).
Activating and deactivating the front-
compartment air conditioning via the
front control unit X
Turn the key to position 2in the ignition
lock.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the ^button.
The indicator lamp in the ^button goes
out. The previously selected settings come
into effect again.
X To switch off: press the^button.
The indicator lamp in the ^button lights
up.
Activating/deactivating the rear-com-
partment air conditioning via the front
control unit (Thermatic 2-zone auto-
matic climate control) X
Turn the key to position 2in the ignition
lock.
X To activate/deactivate: press the^
button (Y page 138).
The indicator lamp in the ^button lights
up or goes out. 140
Air conditioningControls
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Activating/deactivating the rear-com-
partment air conditioning via the front
control unit* (Thermotronic multi-zone
luxury automatic climate control*)
X
Turn the key to position 2in the ignition
lock.
X To switch on: press theYbutton
(Y page 139).
ON and MODE are shown in the Thermotronic
multi-zone luxury automatic climate con-
trol* display behind the Ysymbol. The
MODE display goes out after three seconds.
The display switches back to the standard
display.
X To deactivate: press theYbutton
(Y page 139).
MODE is shown in the display behind the
Y symbol.
X Press the ^button (Y page 139).
OFF is shown in the display behind the
Y symbol.
Activating/deactivating the rear-com-
partment air conditioning via the rear
control unit* (Thermotronic multi-zone
luxury automatic climate control*) X
Turn the key to position 2in the ignition
lock.
X Activate Thermotronic multi-zone luxury
automatic climate control*.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up.
X To switch off: press the^button.
The indicator lamp in the ^button lights
up. Switching cooling with air dehumidi-
fication on/off
The "cooling with air dehumidification" func-
tion is only available when the engine is run-
ning. The air inside the vehicle is cooled and dehumidified according to the temperature
selected. G
Risk of accident
If you switch off the "Cooling with air dehu-
midification" function, the air inside the vehi-
cle will not be cooled (in warm weather) or
dehumidified. The windows could mist up
more quickly. This may prevent you from
observing the traffic conditions, thereby caus-
ing an accident.
Condensation may drip from the underside of
the vehicle when Thermatic is in cooling
mode.
X To activate: press theÁbutton.
The indicator lamp in the Ábutton
comes on.
X To switch off: press theÁbutton.
The indicator lamp in the Ábutton goes
out. The cooling with air dehumidification
function has a delayed switch-off feature. Controlling the air conditioning auto-
matically
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
The automatic air conditioning will achieve
optimal operation if "cooling with air dehu-
midification" is also activated. If necessary,
cooling with air dehumidification can be deac-
tivated.
Controlling the front-compartment air
conditioning via the front control unit X
Turn the key to position 2in the ignition
lock.
X Set the desired temperature.
X To switch on: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow
are activated. Air conditioning
141Controls
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X
To deactivate: press theKorI
button.
The indicator lamp in the Ãbutton goes
out. Automatic airflow is deactivated and
the airflow is controlled according to the
level set. Automatic air distribution
remains activated.
or
X Press the Z,M,¯,\,P,
c orO button.
The indicator lamp in the Ãbutton goes
out. Automatic air distribution is deactiva-
ted. Air distribution is controlled according
to the position set. Automatic airflow
remains activated.
Controlling the rear-compartment air
conditioning automatically via the rear
control unit* X
Turn the key to position 2in the ignition
lock.
X Activate Thermotronic luxury multi-zone
automatic climate control*.
X Set the desired temperature.
X To switch on: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow
are activated.
X To deactivate: press theKorI
button.
Automatic airflow is deactivated and the
airflow is controlled according to the level
set. Automatic air distribution remains acti-
vated.
or
X Press one of the MorO buttons.
Automatic air distribution is deactivated.
Air distribution is controlled according to
the position set. Automatic airflow remains
activated. Setting the temperature
Thermatic 2-zone automatic climate
control Different temperatures can be set for the
driver's and front-passenger sides.
X
Turn the key to position 2in the ignition
lock.
X To increase/reduce: turn controls:and
C clockwise or anti-clockwise
(Y page 138). Only change the temperature
setting in small increments. Start at 22 †.
Thermotronic multi-zone luxury auto-
matic climate control* Climate zones of Thermotronic multi-zone luxury
automatic climate control*
You can select different temperature settings
for the driver's and front-passenger sides as
well as for the rear compartment.
X To increase/reduce the front-compart-
ment temperature using the front con-
trol unit: turn the key in the ignition lock
to position 2.
X Turn controls :and Eclockwise or anti-
clockwise (Y page 139). Only change the
temperature setting in small increments.
Start at 22 †.
X To increase/reduce the rear-compart-
ment temperature using the front con- 142
Air conditioningControls
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trol unit:
turn the key in the ignition lock
to position 2.
X Press the Ybutton.
The display message shown in the display
changes to rear-compartment air condi-
tioning.
X Turn control Eclockwise or anti-clockwise
(Y page 139). Only change the temperature
setting in small increments. Start at 22 †.
i Press the Ybutton to return to the
standard display.
i The rear-compartment display returns to
the standard display automatically after
three seconds.
X To increase/reduce the rear-compart-
ment temperature using the rear con-
trol unit*: turn the key in the ignition lock
to position 2.
X Turn control Rclockwise or anti-clockwise
(Y page 139). Only change the temperature
setting in small increments. Start at 22 †. Adjusting the air vents
G
Risk of injury
Very hot or very cold air can flow from the air
vents. This could cause burns or frostbite to
bare skin in the immediate vicinity of the
vents. Keep bare skin away from these air
outlets. If necessary, direct the airflow away
to a different 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:
R keep the air inlet grille on the bonnet free
of blockage, such as ice, snow or leaves.
R never cover the vents or air inlet and outlet
grilles in the vehicle interior. i
For virtually draught-free ventilation,
adjust the sliders of the air vents to the
centre position.
Setting the centre air vents :
Centre air vent, left
; Centre air vent, right
= Control for right-hand centre air vent
? Control for left-hand centre air vent
X To open/close: turn controls=and ?to
the right or left.
Setting the side air vents X
To open/close: turn control=to the right
or to the left.
i Demister vent :is never completely
shut, even if side air vent ;is shut. Air conditioning
143Controls
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\
directs the airflow through the centre
and side air vents
P directs the airflow through the centre
and side air vents
Rear control unit*:
M directs the airflow through the rear-
compartment air vents
O directs the airflow through the footwell
air vents
X Turn the key to position 2in the ignition
lock.
X Press the Z,M,¯,c,O,
\ orP button. Setting the airflow
X Turn the key to position 2in the ignition
lock.
X To increase/reduce: press theKor
I button.
Vehicles with Linguatronic*: when voice con-
trol is started the airflow is restricted to 50%.
After voice control is finished, the airflow is
adjusted back to the previous setting. Switching the Mono function on/off
Only Thermotronic luxury automatic climate
control* features the "mono" function.
You can use the "mono" function to adopt the
settings configured for temperature, air dis-
tribution and airflow on the driver's side for
the front-passenger side and the rear com-
partment.
X Press the ºbutton.
The indicator lamp in the ºbutton lights
up or goes out. Demisting the windscreen
i You should only select the "demisting"
function until the windscreen is clear again.
X Turn the key to position 2in the ignition
lock.
X To activate: press the¦button.
The indicator lamp in the ¦button lights
up.
The system automatically switches to the
following functions:
R cooling with air dehumidification on
R high airflow 26
R high temperature 26
R air distribution to the windscreen and
front side windows
R air-recirculation mode off
X To 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 dehu-
midification function remains on. Air-recir-
culation mode remains deactivated.
or
X Press the ^button.
or
X Press the Ãbutton.
or
X Turn the temperature control clockwise or
anti-clockwise.
or
X Press the KorI button.
26 Depending on the outside temperature. Air conditioning
145Controls
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Demisting the windows
Windows misted up on the inside X
Activate the "cooling function with air dehu-
midification" function.
X Activate automatic mode.
X If the windows continue to mist up, activate
the demisting function.
i You should only select this setting until
the windscreen is clear again.
Windows misted up on the outside X
Activate the windscreen wipers.
X Press the P/\ orO/c air
distribution button.
i You should only select this setting until
the windscreen is clear again. Switching the rear window heating
on/off G
Risk of accident
Make sure that all windows are clear of ice
and snow before starting a journey. This may
otherwise obstruct your view of the traffic
conditions, thereby causing an accident.
i The rear window heating has a high cur-
rent draw. You should therefore switch it
off as soon as the window is clear, as it only
switches off automatically after several
minutes.
i If the battery voltage is too low, the rear
window heating may switch off.
X Turn the key to position 2in the ignition
lock.
X Press the ªbutton.
The indicator lamp in the ªbutton lights
up or goes out. Activating/deactivating air-recircula-
tion mode
You can deactivate the flow of fresh air if
unpleasant odours are entering the vehicle
from outside. The air already inside the vehi-
cle will then be recirculated. G
Risk of accident
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 2in the ignition
lock.
X To activate: press thedbutton.
The indicator lamp in the dbutton lights
up.
i Air-recirculation mode is activated auto-
matically at high outside temperatures.
When air-recirculation mode is activated
automatically, the indicator lamp in the
d button is not lit.
Outside air is added after about 30
minutes.
X To switch off: 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 † 146
Air conditioningCont
rols
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