— Check the fuse of the Climate Control
system
→
page 300.
— Replace the active combi
filter.
— If the fault persists, go to a correspond-
ingly
qualified
workshop.
Condensation on the windows
Condensation forms on the windows if they
are colder than the ambient temperature
and the air is very humid. Cold air can ab-
sorb less moisture than warm air, which is
why condensation frequently forms on win-
dows in cold weather.
1. Keep the air intake in front of the wind-
screen free from ice, snow and leaves
to improve the heating or cooling out-
put
→
page 361.
2. Do not cover the air vents in the rear of
the luggage compartment so that air
can
flow
through the vehicle from the
front to the rear.
3. Switch on the defrost function
→
page 122.
The wrong unit of temperature has
been set
1. Change the unit of temperature for all
temperature displays in the vehicle us-
ing the Infotainment system
→
page 34.
Water or water vapour under the vehicle
If the humidity and temperature outside
the vehicle are high, condensation can drip
off
the evaporator in the cooling system
and form a pool underneath the vehicle.
This is normal and does not indicate a leak.
If the outside humidity is high and the out-
side temperature low, condensation may
evaporate when the auxiliary heater is run-
ning. If this is the case, steam may appear
underneath the vehicle. The vehicle is not
damaged.
Touch panels do not react as expected
Moisture, dirt and grease can impede the
functioning of the touch panels.
1. Always keep touch panels clean and
dry.
Auxiliary heater and ventila-
tion
Introduction
The auxiliary heater and ventilation
system can be used to heat the vehicle
interior in the winter and ventilate it in
the summer. It is able to clear ice, con-
densation and a thin layer of snow
from the windscreen. The auxiliary
heater is supplied with fuel from the
vehicle fuel tank and can be operated
when the vehicle is stationary with the
ignition switched
off.
The auxiliary ven-
tilation system is powered by the 12-
volt vehicle battery.
Auxiliary heater mode (Automatic Cli-
mate Control only)
When the auxiliary heater is switched on,
the vehicle automatically sets the operat-
ing mode
Heating
or
Ventilation
depend-
ing on the outside temperature. At high
outside temperatures, the auxiliary ventila-
tion system directs fresh air into the vehicle
and prevents the accumulation of heat.
Auxiliary heater exhaust system
The emissions generated by the auxiliary
heater are removed via an exhaust pipe
fit-
ted
underneath the vehicle. The exhaust
pipe must not be blocked by snow, mud or
any objects.
DANGER
Among the emissions from the auxiliary
heater is carbon monoxide, which is an
odourless and colourless poisonous gas.
Carbon monoxide can cause people to
lose consciousness. It can also cause
death.
·
Never switch on the auxiliary heater or
leave the auxiliary heater running if the
vehicle is located in enclosed or unven-
tilated spaces.
·
Never program the auxiliary heater to
switch on and run in unventilated or en-
closed spaces.
128
Heating and air conditioning system
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