MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA.
MAX COOL is only operational when the
engine is running.
X
To activate: press the
Ù
button.
The indicator lamp in the button lights up.
X
To deactivate: press the
Ù
button.
The indicator lamp in the button goes out.
The previously selected settings are
restored.
When you activate MAX COOL, climate control
switches to the following functions:
R
maximum cooling
R
maximum airflow
R
air-recirculation mode on
Removing condensation from the
windows
Windows fogged up on the inside
X
Activate the
¿
cooling with air dehumidi-
fication function.
X
Activate the
Ã
mode button.
X
If the windows continue to fog up, activate
the
¬
"Windshield defrosting" function.
i
You should only select this setting until the
windshield is clear again.
Windows fogged up on the outside
X
Activate the windshield wipers.
X
Press the
_
button repeatedly until the
P
or
O
symbol appears in the display.
i
You should only select this setting until the
windshield is clear again.
Rear window defroster
General notes
The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the rear window is clear. Otherwise,
the rear window defroster switches off auto-
matically after several minutes.
If the battery voltage is too low, the rear win-
dow defroster may switch off.
Activating/deactivating
X
Turn the SmartKey to position
2
in the igni-
tion lock (
Y
page 126).
X
Press the
¤
button.
The indicator lamp in the
¤
button lights
up or goes out.
Problems with the rear window defroster
Problem
Possible causes/consequences and
M
M
Solutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.
The on-board voltage is too low because too many electrical con-
sumers are switched on.
X
Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again.
Operating the climate control systems
121
Cl
imate
co
ntrol
Summary of Contents for SL 450 2019
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