Switching air-recirculation mode
on/off
General notes
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particular
at low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
Activating/deactivating
X
Turn the SmartKey to position
2
in the igni-
tion lock (
Y
page 126).
X
To activate: press the
g
button.
The indicator lamp in the
g
button lights
up.
i
Air-recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures. When air-recir-
culation mode is activated automatically,
the indicator lamp in the
g
button is not
lit. Outside air is added after about
30 minutes.
X
To deactivate: press the
g
button.
The indicator lamp in the
g
button goes
out.
i
Air-recirculation mode deactivates auto-
matically:
R
after approximately five minutes at out-
side temperatures below approximately
41 ‡ (5 †)
R
after approximately five minutes if cooling
with air dehumidification is deactivated
R
after approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †) if the "Cooling with air dehumidifi-
cation" function is activated
Switching the residual heat on or off
General notes
The residual heat function is only available on
vehicles for Canada.
It is possible to make use of the residual heat
of the engine to continue heating the station-
ary vehicle for up to 30 minutes after the
engine has been switched off. The heating
time depends on the set interior temperature.
Activating/deactivating
X
Turn the SmartKey to position
u
in the igni-
tion lock or remove it (
Y
page 126).
X
To activate: press the
Ì
button.
The indicator lamp in the
Ì
button lights
up.
i
The blower will run at a low speed regard-
less of the airflow setting.
i
If you activate the residual heat function at
high temperatures, only the ventilation will
be activated. The blower runs at medium
speed.
X
To deactivate: press the
Ì
button.
The indicator lamp in the
Ì
button goes
out.
Residual heat is deactivated automatically:
R
after approximately 30 minutes
R
when the ignition is switched on
R
if the battery voltage drops
Setting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the
air vents. This could result in burns or frost-
bite in the immediate vicinity of the air
vents. There is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
G
WARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head
restraints. This could result in burns in the
immediate vicinity of the air vents. There is a
risk of injury.
Reduce the heater output before it becomes
too hot.
122
Setting the air vents
Cli
mat
e
con
tr
ol
Содержание SL 450 2019
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