Mercedes-Benz 2013 M Class - Manual (Page 151)

X To activate: press the Ù button.
The indicator lamp in the button lights up.
X To activate: press off-road button Ù
again.
The indicator lamp 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
Defrosting the windows
Windows fogged up on the inside
X Activate the ¿ / Á cooling with air
dehumidification function.
X Activate automatic mode Ã.
X If the windows continue to fog up, activate
the defrosting function (
Y page 148).
i You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside
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
Activating/deactivating
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
automatically after several minutes.
If the battery voltage is too low, the rear
window defroster may switch off.
X Turn the SmartKey to position 2 in the
ignition lock ( Y page 157).
X Press the ¤ button.
The indicator lamp in the ¤ button lights
up or goes out.
Operating the climate control systems
149
Climate control