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Automatic windscreen heating is also active
when the air conditioning system is switched
off.
Windscreen heating using the defrost func-
tion
The windscreen heating will be switched on
when the defrost function is switched on and
a sensor detects that condensation may form
on the windscreen.
When does the windscreen heating switch
off?
The windscreen heating switches itself off if
one of the following conditions is met:
— The power consumption is too high.
— There is a fault in the air conditioning sys-
tem.
— The specified time has elapsed.
Troubleshooting
Please refer to
and
the chapter on page 120.
or
CO2 concentration in the air of
the vehicle interior too high
The indicator lamp lights up red or yellow.
The message
Health risk! High CO2 concentration. Open
or
windows!
Health risk! CO2 too high. Open all windows im-
may be displayed on the instrument
mediately!
cluster display.
— Open all windows immediately.
— Go to a qualified workshop and have the
system checked.
Air conditioning system not working
correctly or CO2 concentration cannot
be measured
The indicator lamp lights up yellow.
126
Heating and air conditioning system
The message
rectly. Visit workshop.
strument cluster display.
— Go to a qualified workshop and have the
system checked.
Cooling mode
its function is restricted
Cooling mode
as the driver seat is occupied.
— Switch on the blower.
— Check the fuse of the air conditioning sys-
tem → page 296.
— Change the dust and pollen filter
→ page 353.
— If the fault persists, go to a qualified work-
shop.
The heating and fresh air system cannot be
switched on or its function is restricted
— If the fault persists, go to a qualified work-
shop.
Condensation on the windows
at the start of
Condensation may form on the windows if
they are colder than the ambient tempera-
ture and the air is very humid. Cold air can
absorb less moisture than warm air, which is
why condensation frequently forms on win-
dows in cold weather.
— Keep the air intake in front of the wind-
screen free of ice, snow and leaves in or-
der to improve heating and cooling per-
formance → page 355.
— Do not cover the air vents in the rear of
the luggage compartment. Ensuring they
are not covered will allow air to flow
through the vehicle from the front to the
rear.
— Switch on the defrost function
→ page 121.
The wrong unit of temperature has been set
— Change the unit of temperature for all
temperature displays in the vehicle using
the Infotainment system → page 30.
Air conditioning system not working cor-
may be displayed in the in-
cannot be switched on or
begins to function as soon
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