Air conditioning
Overview of air-conditioning systems
The vehicle is equipped with one of the following air-conditioning systems:
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2-zone Thermatic
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Thermotronic*
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2-zone Thermatic is an automatic air-conditioning system combining an automatic heating and ventilation system with a cooling system.
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The Thermotronic automatic air-conditioning system combines an automatic heating and ventilation system with a cooling system. You can control the air conditioning separately for the driver's and front-passenger sides.
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General notes
2-zone Thermatic/Thermotronic* controls the temperature and the humidity of the vehicle interior and filters out undesirable substances from the air.
2-zone Thermatic/Thermotronic* is only operational when the engine is running. Optimum operation is only achieved when you drive with the side windows and panorama sliding sunroof* closed.
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Ventilate the vehicle for a brief period during warm weather, e.g. using the summer opening feature more. This will speed up the cooling process and the desired interior temperature will be reached more quickly.
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The integrated filter filters 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.
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 | Risk of accident |
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Observe the settings recommended on the following pages. The windows could otherwise mist up. This may obstruct your view of the traffic situation, thereby causing an accident.
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Overview of air-conditioning system functions
2-zone Thermatic
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Function
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Recommendation/Notes
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 Increases/reduces the airflow
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more
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Sets the temperature, left
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Set the temperature to 22  .
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more
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Sets the temperature, right
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Set the temperature to 22 .
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more
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Sets the air distribution
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more
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 Switches the rear window heating on/off
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At very low temperatures, the rear window heating is only switched on once the vehicle interior has warmed up.
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more
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 Activates/deactivates cooling with air dehumidification
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Switch on the air conditioning with air-dehumidification function. The indicator lamp in the button comes on.
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more
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 Switches residual heat on and off
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You can use the residual heat to heat or ventilate the vehicle interior after you have switched off the ignition.
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more
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 Controls the air conditioning automatically
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Activate automatic air conditioning. The indicator lamp in the button comes on.
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more
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 Activates/deactivates Thermatic
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Only use this operating mode for a short time, e.g. in a tunnel. Otherwise, the windows can mist up due to lack of fresh air.
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more
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 Demists the windscreen
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Only use the "demisting" function until the windscreen is clear again.
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more
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Thermotronic*
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Function
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Recommendation/Notes
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Sets the air distribution, left
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more
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Demists the windscreen
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Only use the "demisting" function until the windscreen is clear again.
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more
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 Increases the temperature, left
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Set the temperature to 22 .
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more
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Display
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Increases the airflow
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more
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Increases the temperature, right
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Set the temperature to 22 .
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more
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Switches the rear window heating on/off
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At very low temperatures, the rear window heating is only switched on once the vehicle interior has warmed up.
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more
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Sets the air distribution, right
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more
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 Activates/deactivates pollutant-sensitive air-recirculation mode
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more
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Switches cooling with air dehumidification on/off
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Switch on the air conditioning with air-dehumidification function. The indicator lamp in the button lights up.
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more
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Switches the residual heat function on/off
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You can use the residual heat to heat or ventilate the vehicle interior after you have switched off the ignition.
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more
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 Reduces the temperature, right
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Set the temperature to 22 .
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more
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 Reduces the airflow
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more
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Reduces the temperature, left
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Set the temperature to 22 .
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more
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Activates/deactivates Thermatic
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Only use this operating mode for a short time, e.g. in a tunnel. Otherwise, the windows can mist up due to lack of fresh air.
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more
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 Activates/deactivates Thermotronic
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Activate Thermotronic. The indicator lamp in the button goes out.
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more
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Controls the air conditioning automatically
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Activate automatic air conditioning. The indicator lamp in the button comes on.
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more
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Switching cooling with air-dehumidification on/off
The "cooling with
dehumidification" function is only available when the engine is running. The
air inside the vehicle is cooled and dehumidified according to the temperature
selected. This prevents the windows from misting up.
| Risk of accident |
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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 mist up more quickly. This may prevent you from observing the traffic conditions, thereby causing an accident.
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 | Environmental note |
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The cooling system uses the refrigerant R134A. This refrigerant does not damage the earth's ozone layer.
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Condensation may
drip from the underside of the vehicle when Thermatic is in cooling
mode.
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Controlling the air conditioning automatically
In automatic mode, the set temperature is maintained at a constant level fully automatically. To do so, the system automatically regulates the temperature of the dispensed air, the airflow and the air distribution.
The automatic air conditioning will achieve optimal operation if "cooling with air dehumidification" is also activated. If necessary, cooling with air dehumidification can be deactivated.
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Make sure that the key is in position 2 in the ignition lock.
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Set the desired temperature.
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To activate: press the button.
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The indicator lamp in the button comes on. The automatic airflow and air distribution is activated.
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To deactivate: press the button.
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The indicator lamp in the button goes out. Automatic air distribution and airflow are deactivated.
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Setting the temperature
2-zone Thermatic
Different temperatures can be set for the driver's and front-passenger sides.
Thermotronic*
Different temperatures can be set for the driver's and front-passenger sides.
Setting the air distribution
You can set the air
distribution individually for the driver's and front-passenger sides
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The symbols
for the air distribution have the following meanings:
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Symbol
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Meaning
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Directs the airflow
through the demister vents
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Directs the airflow
to the entire vehicle interior
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Directs the airflow
through the footwell and side air vents
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Directs the airflow
through the centre and side air
vents
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2-zone Thermatic
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Make sure that the
key is in position 2 in the ignition lock.
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Turn thumbwheel
more
to the corresponding symbol. The thumbwheel can also be turned to the area
between two symbols.
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Thermotronic*
Setting the airflow
2-zone Thermatic
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Make sure that the key is in position 2 in the ignition lock.
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To increase/reduce: turn thumbwheel clockwise or anti-clockwise more.
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Thermotronic*
Demisting the windscreen
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You should only select the "demisting" function until the windscreen is clear again.
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Make sure that the key is in position 2 in the ignition lock.
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To activate: press the button.
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The indicator lamp in the button comes on.
The system automatically switches to the following functions:
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cooling with air dehumidification on
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high airflow
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high temperature
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air distribution to the windscreen and front side windows
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air-recirculation mode off
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Demisting the windows
Windows misted
up on the inside
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Activate the "cooling function with air-dehumidification"
function.
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Activate the automatic mode.
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If the windows
continue to mist up, activate the "demisting"
function.
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Windows misted
up on the outside
Switching the rear window heating on/off
| Risk of accident |
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Clear all windows of ice or snow before setting off. Impaired visibility could otherwise endanger you and others.
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At very low
temperatures, the rear window heating is only switched on once the vehicle
interior has warmed up.
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The
rear window heating has a high current draw. You should therefore switch it off
as soon as the window is clear, as it only switches off automatically after
approximately twelve minutes.
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If the battery
voltage is too low, the rear window heating may switch off.
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Make sure that the
key is in position 2 in the ignition lock.
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Press the
button.
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The indicator lamp
in the button
lights up or goes out.
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Activating/deactivating air-recirculation mode
You can deactivate
the flow of fresh air if unpleasant odours are entering the vehicle from
outside. The air already inside the vehicle will then be recirculated.
| Risk of accident |
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Only switch over to air-recirculation mode briefly at low outside temperatures. Otherwise, the windows could mist up, thus impairing visibility and endangering yourself and others. This may prevent you from observing the traffic conditions, thereby causing an accident.
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Make sure that the
key is in position 2 in the ignition lock.
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To
activate: press the button.
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The indicator lamp
in the button
comes on.
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Air-recirculation mode is activated automatically at high outside
temperatures. When air-recirculation mode is activated automatically, the
indicator lamp in the button is not lit.
Outside air is
added after about 30 minutes.
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To deactivate:
press the button.
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The indicator lamp
in the button
goes out.
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Air-recirculation mode
switches off automatically:
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after approximately
five minutes at outside temperatures below approximately 5
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after approximately
five minutes if the air dehumidification is deactivated
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after approximately
30 minutes at outside temperatures above approximately 5
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Air-recirculation mode with the
convenience opening/closing feature
| Risk of injury |
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Make sure that nobody can become trapped between the side window and the door frame as the side windows are opened and closed. Do not place objects or lean against the side window when it is being opened or closed. You or the objects could be drawn in or become trapped between the side window and the door frame as the window moves. If there is a risk of entrapment, press the button again. If necessary, press the switch that stops, opens or closes the side window in the opposite direction.
Make sure that nobody can become trapped when you are opening or closing the sliding/tilting sunroof*. If there is a risk of entrapment, press the button again. If necessary, press the switch to stop, open or close the sliding/tilting sunroof* in the opposite direction.
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Convenience
closing: press and hold the button until the side windows and the
sliding/tilting sunroof* have
closed.
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The indicator lamp
in the button
comes on. Air-recirculation mode is activated.
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Convenience
opening: press and hold the
button until
the side windows and the sliding/tilting sunroof* have reached their original
position.
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The indicator lamp
in the button
goes out. Air-recirculation mode is
deactivated.
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If you open the
side windows or the sliding/tilting sunroof* manually after closing using the
convenience closing feature, it will remain in this position when opened using
the convenience opening feature.
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Pollutant-sensitive
air-recirculation mode
The
"pollutant-sensitive air-recirculation" function is only available in vehicles
featuring Thermotronic*.
The filter reduces
the amount of pollutants as well as odours taken in with the outside air.
Thermotronic* switches to
air-recirculation mode automatically if the pollutant-sensitive
air-recirculation mode is activated and certain values for carbon monoxide and
nitrogen oxide in the outside air are exceeded.
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The
pollutant-sensitive air-recirculation mode cannot be activated if you have
deactivated the cooling with air dehumidification or if the outside temperature
has dropped below 5 .
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To
activate: press the button.
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The indicator lamp
in the button
comes on.
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To deactivate:
press the button.
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The indicator lamp
in the button
goes out.
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Switching the residual heat on and off
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.
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The blower will run
at a low speed regardless of the airflow setting.
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If you activate the
"residual heat" function at high temperatures, only the ventilation will be
activated. The blower runs at medium speed.
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Make sure that the
key is in position 0 in the ignition lock or that it has been
removed.
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To switch
on: press the button.
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The indicator lamp
in the button
lights up.
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To deactivate:
press the button.
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The indicator lamp
in the button
goes out.
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The residual heat
automatically switches off after around 30 minutes or if:
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Switching auxiliary heating/ventilation* on/off
| Risk of poisoning |
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Exhaust fumes are produced when the auxiliary 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 system, e.g. a garage.
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| Risk of fire |
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When operating the auxiliary heating, parts of the vehicle may become very hot, and highly inflammable material such as fuels could be ignited. Operating the auxiliary heating is thus prohibited at filling stations or when your vehicle is being refuelled. You must therefore switch off the auxiliary heating at filling stations.
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The auxiliary heating heats the air in the vehicle interior to the set temperature without using the heat of the running engine. The auxiliary heating is operated using fuel directly from the vehicle's fuel tank. For this reason, the tank content must be at least at reserve fuel level to ensure that the auxiliary heating functions.
The auxiliary heating/ventilation automatically adjusts to changes in temperature and weather conditions. For this reason, the auxiliary 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 activating
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Make sure that the key is in position 2 in the ignition lock.
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Set the temperature.
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The auxiliary heating/ventilation can be activated even when the air conditioning is being controlled manually. Optimum comfort can be attained when the system is set to automatic mode. Set the temperature to 22 .
Activating/deactivating the auxiliary heating/ventilation
The auxiliary heating/ventilation can be activated or deactivated using the remote control or the button on the centre console.
The on-board computer can be used to specify up to three departure times, one of which may be preselected more.
Button on the centre console
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| Auxiliary heating/ventilation |
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Centre console
The indicator lamps in the button may light up in blue, red or yellow.
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Blue: auxiliary ventilation activated
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Red: auxiliary heating activated
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Yellow: departure time preselected more
Activating the auxiliary heating/ventilation
If the key is in position 1 or 2:
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Press and hold button for at least two seconds.
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The red or blue indicator lamp in button lights up.
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If the key is removed or in position 0:
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Briefly press button .
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The red or blue indicator lamp in button lights up.
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Deactivating the auxiliary heating/ventilation
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Briefly press button .
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The red or blue indicator lamp in button goes out.
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Remote control
Your vehicle comes with one remote control. You may use two additional remote controls for your vehicle. For further information, consult a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
The remote control has a maximum range of approximately 300 metres. This range may be reduced by:
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sources of radio interference
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solid objects between the remote control and the vehicle
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the remote control being in an unfavourable position in relation to the vehicle
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transmitting from an enclosed space
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The optimum range can be achieved if you hold the remote control vertically, pointing upwards when you press one of the buttons.
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More information about the auxiliary heating can be found in the "Practical advice" section more.
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| Aerial |
| OFF - to deactivate auxiliary heating/ventilation |
| ON - to activate auxiliary heating/ventilation |
| Indicator lamp |
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Auxiliary heating remote control
Activating the auxiliary heating/ventilation
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Press and hold the ON button until the indicator lamp in the remote control lights up in green.
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The red or the blue indicator lamp in button on the centre console lights up.
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Deactivating the auxiliary heating/ventilation
The auxiliary heating switches off automatically after 50 minutes.
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This time limit can be altered. To do this, visit a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
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Press and hold the OFF button until the indicator lamp in the remote control lights up in red.
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The red or the blue indicator lamp in the button on the centre console goes out.
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