Air Recirculation Mode; Residual Heat And Ventilation - Mercedes-Benz 2011 SL550 Roadster Operator's Manual

Climate control system
154
MAX COOL is only operational when the
engine is running.
If the air distribution controls as well as the
air volume control are set to à and there
is a high need for cooling, MAX COOL is
activated. "MAX COOL" appears in
temperature controls C and H
( Y page 148).
This provides the fastest possible cooling of
the vehicle interior (when retractable hardtop
is closed).
Automatic climate control panel with MAX COOL
activated

Air recirculation mode

Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside (e. g. before driving through
a tunnel). This setting cuts off the intake of
outside air and recirculates the air in the
passenger compartment.
G
Warning!
Fogged windows impair visibility,
endangering you and others. If the windows
begin to fog on the inside, switching off the
air recirculation mode immediately should
clear interior window fogging. If interior
window fogging persists, make sure the air
conditioning is activated, or press button
¬.
X
Activating: Press button g.
The indicator lamp in the button comes on.
i The air recirculation mode is activated
automatically at high outside
temperatures.
The indicator lamp in button g is not lit
when the air recirculation mode is switched
on automatically.
A quantity of outside air is added after
approximately 30 minutes.
X
Deactivating: Press button g again.
The indicator lamp in the button goes out.
The manually selected air recirculation
i
mode is deactivated automatically:
after 5 minutes if the outside
R
temperature is below approximately
41‡ (5†)
after 5 minutes if the air conditioning is
R
turned off
after 30 minutes if the outside
R
temperature is above approximately
41‡ (5†)

Residual heat and ventilation

With the engine turned 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 If you switch on the residual heat function
when outside temperatures are high, only
the ventilation will be switched on.
i How long the system will provide heating
depends on the coolant temperature and
the selected temperature. The blower will
run at low speed regardless of the air
distribution control setting.
X
Activating: Switch off the ignition.
X
Press button Á.
The indicator lamp in the button comes on.
X
Deactivating: Press button Á.
The indicator lamp in the button goes out.