Mercedes-Benz S-Class Coupe Operator's Manual page 145

Problems with the rear window defroster
Problem
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.
Switching air-recirculation mode
on/off
General notes
You can also temporarily deactivate the flow
of fresh air manually if unpleasant odors are
entering the vehicle from outside. The air
already inside the vehicle will then be recir-
culated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
Activating or deactivating
Turn the SmartKey to position 2 in the igni-
X
tion lock ( page 151).
Y
To activate: press the g rocker switch
X
up or down.
The indicator lamp in the g rocker
switch lights up.
Air-recirculation mode is automatically acti-
vated at high levels of pollution or at high out-
side temperatures. The indicator lamp in the
g rocker switch is not lit when automatic
air-recirculation mode is activated. Outside
air is added after about 30 minutes.
To deactivate: press the g rocker
X
switch up or down.
The indicator lamp in the g rocker
switch goes out.
Operating the climate control systems
Possible causes/consequences and M Solutions
The battery has not been sufficiently charged.
Switch off any consumers that are not required, e.g. reading
X
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again.
Air-recirculation mode deactivates automati-
cally:
after approximately five minutes at outside
R
temperatures below approximately 41 ‡
(5 †)
after approximately five minutes if cooling
R
with air dehumidification is deactivated
after approximately 30 minutes at outside
R
temperatures above approximately 41 ‡
(5 †) if the "Cooling with air dehumidifica-
tion" function is activated
Switching the residual heat on or off
General notes
Once the engine is switched off, it is possible
to make use of the residual heat of the engine
to continue heating or ventilating the front
compartment of the vehicle for approximately
30 minutes.
The heating or ventilation time depends on
the temperature that has been set.
Activating or deactivating
Turn the SmartKey to position 0 in the igni-
X
tion lock or remove it (
To activate: press the Á rocker switch
X
up or down.
The indicator lamp in rocker switch Á
lights up.
The blower will run at a low speed regardless
of the airflow setting.
page 151).
Y
143