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

Page: 187 / 412

Climate control
185
i The air recirculation mode is activated
automatically at high outside
temperatures.
The indicator lamp in button
:
is not lit
when the air recirculation mode is switched
on automatically.
A quantity of outside air is added after
approximately 30 minutes.
If you have turned off the air conditioning
or the outside temperature is below 41‡
(5†), the air recirculation mode will not
switch on automatically.
X
Deactivating: Press button
:
.
The indicator lamp in the button goes out.
i The manually selected air recirculation
mode is deactivated automatically:
R
after 5 minutes if the outside
temperature is below approximately
41‡ (5†)
R
after 5 minutes if the air conditioning and
air-drying are turned off
R
after 30 minutes if the outside
temperature is above approximately
41‡ (5†)
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
Controls in detail
Z