Residual Heat And Ventilation - Mercedes-Benz 2008 M-Class Operator's Manual

Controls in detail
3-zone automatic climate control*
Activating
Adjust the temperature, air volume and
air distribution ( page 220).
Press button ; ( page 220).
The indicator lamp on the button
comes on.
The driver-side settings are used for all
temperature zones.
Deactivating
Press button ; ( page 220) again.
The indicator lamp on the button goes
out.
i
If you manually set the temperature, air vol-
ume 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.
230

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
the battery voltage
Regardless of the temperature and air volume
set on the automatic climate control panel, an
interior temperature is aimed at by 72°F (22°C)
and the blower runs on low speed to protect the
vehicle battery.
Activating
Switch off the ignition ( page 39).
Press button 9 ( page 220).
The indicator lamp on the button
comes on.
Deactivating
Press button 9.
The indicator lamp on the button goes
out.
i
The residual heat is automatically turned off:
when the ignition is switched on
after about 30 minutes
if the coolant temperature is too low
if the battery voltage drops