Page 126 of 284

120 Climate controlClimate control
Picture no: 18203s.tif
Heating and ventilation system,
air conditioning system
3
Ventilation, heating and cooling 3 are
combined into one unit that is designed to
provide comfort regardless of the season,
weather or outside temperature.
When cooling 3 is activated, the air is
cooled and dried. The heating unit heats the air as required in
all operating modes depending on the
position of the temperature switch. The air
supply can be adjusted to suit
requirements by means of the fan.
Heating and ventilation system, air conditioning system 3...................... 120
Electronic climate control system 3... 121
Air vents ............................................... 122
Heating and ventilation system ......... 123
Air conditioning system 3................... 126
Electronic climate control system 3... 128
Auxiliary heater ................................... 134
Air intake .............................................. 135
Pollen filter ........................................... 135
Regular operation ............................... 135
Service .................................................. 135
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Page 129 of 284
123
Climate control
Picture no: 18208s.tif
Heating and ventilation system Temperature
Adjusted using left-hand rotary switch.
The amount of heat is dependent on the
coolant temperature and is thus not fully
attained until the engine is warm.
Picture no: 18209s.tif
Air flow
Adjusted using centre rotary switch.
The rate of air flow is determined by the
fan. The fan should therefore also be
switched on during a journey.
Picture no: 18207s.tif
Air distribution
Set using right rotary switch.
Intermediate settings are possible.
Open the air vents when the switch is set to
L or M.
Turn clockwise = Warm
Turn anticlockwise = Cold
x
Off
1 - 4 Selected fan speed
MTo headroom via adjustable
air vents
L To headroom via adjustable
air vents, to footwell
K To footwell
J To windscreen, to front side
windows, to footwell
l To windscreen and front side
windows
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Page 130 of 284

124 Climate control
Picture no: 18210s.tif
Ventilation
zSet the temperature to the desired
setting.
z Switch fan on, select fan setting
according to requirements.
z For maximum ventilation in the head
area: set the air distribution switch to M,
open all air vents, direct the air vent slats
3 122.
z For ventilation to foot well: Set air
distribution switch to K.
z For simultaneous ventilation to the head
area and the foot well: Set air
distribution switch to L. Heating
For rapid warming of the passenger
compartment:
z
Turn the temperature switch clockwise as
far as it will go (warm).
z Set the fan to speed 3.
z Open air vents.
z Set air distribution switch to desired
position, preferably position J, 3 123. The comfort and general well-being of the
vehicle occupants are to a large extent
dependent on a suitab
le ventilation and
heating setting.
To achieve temperature layering with the
pleasant effect of "cool head and warm
feet", set the air distribution rotary switch
to K or J and move the rotary
temperature switch to any position you like
(with temperature strati fication effect in
the centre zone).
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Page 131 of 284
125
Climate control
Picture no: 18211s.tif
Heating the foot well
zRotate temperature switch to right-hand
zone.
z Switch on fan.
z Set air distribution switch to K.
Picture no: 18212s.tif
Window demisting and de-icing
Misted or icy windows, e. g. due to damp
weather, damp clothing or low outside
temperatures: z
Turn the temperature switch clockwise as
far as it will go (warm).
z Move fan switch to 3 or 4.
z Move air distribution switch to l.
z To heat footwell at same time, move air
distribution switch to J.
z Open side air vents as required and
direct them towards door windows.
z Switch on heated rear window Ü.
9
Warning
Disregard of the instructions could lead
to misting or icing of the windows and
subsequent accidents due to impaired
visibility.
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Page 132 of 284

126 Climate controlAir conditioning system
3
As a supplement to the heating and
ventilation system, the air conditioning
system cools and dehumidifies (dries)
inflowing air.
If cooling or dehumidification is not
desired, switch off cooling in order to save
fuel.
Cooling switches off automatically at low
outside temperatures.
Picture no: 18213s.tif
Cooling n
Only operate with the engine and fan
running. Activate and deactivate with
the n button.
When cooling is active (AC compressor) the
air is cooled and dehumid ified. If cooling or
dehumidification is not desired, switch off
cooling in order to save fuel.
Cooling switches off automatically at low
outside temperatures.
When cooling operates, condensation
forms and drips from the underside of the
vehicle.
Picture no: 18214s.tif
Air recirculation system 4
The air recirculation mode of the
ventilation system is activated and
deactivated by pressing the 4 button.
If fumes or unpleasant odours penetrate
from outside: temporarily switch on air
recirculation system 4.
To increase cooling at high outside
temperatures, switch on the air
recirculation system briefly.
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131
Climate control
If a temperature below 16 C is set, Lo
appears in the display: the climate control
system runs constantly at maximum
cooling power. The temperature is not
regulated.
If a temperature above 28 C is set, Hi
appears in the display: the climate control
system runs constantly at maximum
heating power. The temperature is not
regulated.
The temperature setting is saved when the
ignition is switched off.
Picture no: 18484s.tif
Window demisting and de-icing
Misted or icy windows, e. g. due to damp
weather, damp clothing or low outside
temperatures:
Press V button. V appears in display:
control indicator in button illuminates.
Temperature and air distribution are set
automatically and the fan runs at a high
speed. The air flow can be increased or decreased
by turning the right knob.
To return to automatic mode: press
button
V or AUTO .
Heated rear window 346.
9
Warning
Disregard of the instructions could lead
to misting or icing of the windows and
subsequent accidents due to impaired
visibility.
FM AS [TP] REG CDinMP3
90.6
MHz
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Page 140 of 284
134 Climate control
Picture no: 18224s.tif
Manual air recirculation mode
The air recirculation system prevents the
entry of outside air and the air in the
passenger compartment is circulated.
Operated with the 4 button. To deactivate manual
air recirculation:
Press button 4 again. The control
indicator in the butt on will go out.
Auxiliary heater Depending on outside temperature and
engine temperature, the passenger
compartment of vehicles with Quickheat 3
electric auxiliary heating is warmed up
more quickly.
Diesel-engined vehicles have a fuel-
powered auxiliary heater 3.
9
Warning
The exchange of fresh air is reduced in
air circulation mode. The quality of the
passenger compartment air deterio-
rates which may cause the vehicle occu-
pants to feel drowsy. In operation
without cooling the air humidity
increases, so the windows may mist up.
Consequently, the air circulation system
should only be run for short periods of
time.
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135
Climate control
Picture no: 18226s.tif
Air intake The air intakes in the engine compartment
in front of the windscreen must be kept free
of leaves, dirt and snow in order to provide
a supply of air.
Pollen filter The pollen filter cleans dust, soot, pollen
and spores from the air entering from
outside. The active carbon layer 3
eliminates most odours and noxious
environmental gases from the air.
Regular operationFor consistently good operation, the air
cooling system 3 must be switched on for
several minutes once per month regardless
of the weather and the time of year.
Operation not possible with the cooling
system switched on and when the outside
temperature is low. Service For optimal cooling performance, we
recommend that the climate control
system be checked annually, starting three
years after initial vehicle registration.
z Functionality and pressure test
z Heating functionality
z Leakage check
z Check of drive belts
z Cleaning of condenser and evaporator
drainage
z Performance check
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