Operation Manual

Problems with the rear window defroster
Problem
Possible causes/consequences and M Solutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.
The battery has not been sufficiently charged.
X
Switch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window defroster
can be activated again.
Switching air-recirculation mode
on/off
General notes
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle from
outside. The air already inside the vehicle will
then be recirculated.
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
Activating or deactivating
X
Turn the SmartKey to position 2 in the ignition
lock (
Y page 127).
X
To activate: press the g button.
The indicator lamp in the g button lights
up.
i
Dual-zone automatic climate control: air-
recirculation mode is automatically activated
at high outside temperatures.
3-zone automatic climate control: air-recircu-
lation mode is automatically activated at high
levels of pollution or at high outside temper-
atures.
When air-recirculation mode is activated
automatically, the indicator lamp above the
g button does not light up. Outside air is
added after about 30 minutes.
X
To deactivate: press the g button.
The indicator lamp in the g button goes
out.
i Air-recirculation mode deactivates auto-
matically:
R
after approximately five minutes at outside
temperatures below approximately 41 ‡
(5 †)
R
after approximately five minutes if cooling
with air dehumidification is deactivated
R
after approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †) if the "Cooling with air dehumidifica-
tion" function is activated
Switching the residual heat on or off
General notes
The residual heat function is only available with
dual-zone automatic climate control.
It is possible to make use of the residual heat of
the engine to continue heating the vehicle for
approximately 30 minutes after the engine has
been switched off. The heating time depends on
the set interior temperature.
Activating/deactivating
X
Turn the SmartKey to position 0 in the ignition
lock or remove it (
Y page 127).
X
To activate: press the Ì button.
The indicator lamp in the Ì button lights
up.
i
If the residual heat function is activated, the
windows may fog up on the inside.
i
The blower will run at a low speed regardless
of the airflow setting.
124
Operating the climate control systems
Climate control