Mercedes-Benz 2009 R-Class, Operator'S Manual

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Rear window defroster
199
Residual heat and ventilation
With the engine switched off, it is possible to
continue to heat or ventilate the interior for
up to 30 minutes. This feature makes use of
the residual heat produced by the engine.
i
How long the system will provide heating
depends on the coolant temperature and
the battery voltage.
Regardless of the temperature and air
volume set on the climate control panel, an
interior temperature is aimed at by 72‡
(22†) and the blower runs on low speed to
protect the vehicle battery.
X
Activating: Switch off the ignition.
X
Press button
9
.
The indicator lamp in the button comes on.
X Deactivating: Press button
9
again.
The indicator lamp in the button goes out.
The residual heat is deactivated
automatically:
R
when the ignition is switched on
R
after approximately 30 minutes
R
if the battery voltage drops
R
if the coolant temperature is too low
Using driver-side settings for all
temperature zones
This feature is only available in Canada
vehicles.
You can use the settings of the driver’s side,
such as temperature, air volume and air
distribution, for all temperature zones. These
settings only need to be made once and the
climate control system will automatically
regulate the settings for all temperature
zones quickly and comfortably.
X
Activating: Adjust the air temperature, air
volume and air distribution.
X
Press button
;
.
The indicator lamp in the button comes on.
The driver-side settings are used for all
temperature zones.
X
Deactivating: Press button
;
again.
The indicator lamp in the button goes out.
i If you manually set the temperature, air
volume or air distribution for the passenger
side or the rear passenger compartment
when the
MONO setting is active, the
MONO setting will be switched off.
Rear window defroster
G
Warning!
Any accumulation of snow and ice should
be removed from the rear window before
driving. Visibility could otherwise be
impaired, endangering you and others.
The rear window defroster uses a large
amount of power. To keep the battery drain
to a minimum, switch off the defroster as
soon as the rear window is clear. The
defroster is switched off automatically after
some time of operation depending on the
outside temperature.
X
Switch on the ignition.
X
Switching on: Press button
1
on the
respective climate control panel.
The indicator lamp in the button comes on.
X Switching off: Press button
1
again.
! If the rear window defroster switches off
too soon and the indicator lamp starts
flashing, too many electrical consumers
are operating simultaneously and there is
insufficient voltage in the battery. The
system responds automatically by
switching the rear window defroster off.
Controls in detail
Z