Mercedes-Benz S-Class Coupe 2015 Operator's Manual page 140

Operating the climate control systems
138
Windows fogged up on the outside
Activate the windshield wipers.
X
Switch on automatic mode using the Ã
X
rocker switch.
i
If you clean the windows regularly, they
do not fog up so quickly.
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
Turn the SmartKey to position 2 in the igni-
X
tion lock ( page 147).
Y
Press the ¤ rocker switch up or down.
X
The indicator lamp in the ¤ rocker
switch lights up or goes out.