Problems With The Rear Window Defroster; Activating/Deactivating Air-Recirculation Mode; Activating/Deactivating The Residual Heat Function - Mercedes-Benz S-Class Operator's Manual

Problems with the rear window defroster

Problem
The rear window
defroster has
deactivated
prematurely or cannot
be activated.
Activating/deactivating air-
recirculation mode
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
recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in
particular at low temperatures. Only use air-
recirculation mode briefly to prevent the
windows from fogging up.
Activating/deactivating
Turn the SmartKey to position 2 in the
X
ignition lock ( page 171).
Y
To activate: press the g rocker switch
X
up or down.
The indicator lamp in the g rocker
switch lights up.
i
Air-recirculation mode is automatically
activated at high levels of pollution or at
high outside 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 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.
i
Air-recirculation mode deactivates
automatically:
after approximately five minutes at
R
outside temperatures below
approximately 41 ‡ (5 †)
after approximately five minutes if
R
cooling with air dehumidification is
deactivated
after approximately 30 minutes at
R
outside temperatures above
approximately 41 ‡ (5 †) if the "Cooling
with air dehumidification" function is
activated
Activating/deactivating the residual
heat function
General notes
Vehicles with rear-compartment climate
control: 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 rear and front compartment of the vehicle
for approximately 15 minutes. If the "Residual
heat" function is set for only the front or only
the rear compartment, it is possible to
continue heating or ventilating for
approximately 30 minutes.
Vehicles without rear-compartment
climate control: 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.
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