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

Controls in detail
3-zone automatic climate control* (Canada only)
Activating: Press button ,
( page 259).
The indicator lamp in the button comes
on.
i
The air recirculation mode is activated auto-
matically at high outside temperatures.
The indicator lamp on button , is not lit when
the air recirculation mode is automatically
switched on.
A quantity of outside air is added after approxi-
mately 30 minutes.
Deactivating: Press button ,
( page 259) again.
The indicator lamp in the button goes
out.
i
The air recirculation mode is deactivated au-
tomatically:
after 5 minutes if the outside temperature is
below approximately 7°C (45°F)
after 5 minutes if the air conditioning is
turned off
after 30 minutes if the outside temperature
is above approximately 5°C (41°F)
266

Residual engine heat and ventilation

With the engine switched off, it is possible
to continue to heat or ventilate the interior
for approximately 30 minutes. This feature
makes use of the residual heat produced
by the engine.
i
If you switch on the residual heat function
when outside temperatures are high, only the
ventilation will be switched on.
i
Regardless of the selected air volume, the
blower operates at low speed when heating. In
case of ventilation the blower operates at higher
speed.
i
How long the system will provide heating de-
pends on
the coolant temperature
the temperature set by the operator
Activating: Switch off the ignition.
Press button T ( page 259).
The indicator lamp in the button comes
on.
Deactivating: Press button T
( page 259) again.
The indicator lamp in the button goes
out.
i
The residual heat is automatically turned off:
when the ignition is switched on
after approximately 30 minutes
if the battery voltage drops
if the coolant temperature is too low