Rear Window Defroster - Mercedes-Benz 420 SEL 1986 Owner's Manual

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Rear Window Defroster

With engine running, press symbol
side of rocker switch to turn on,
bottom to turn off.
When activating the rear window de­
froster, the indicator lamp inside the
switch will come on.
46
Note:
The rear window defroster uses a
large amount of power. To keep the
battery drain to a minimum, turn off
the defroster as soon as the window
is clear. The defroster is automatically
turned off after a maximum of 20 mi­
nutes of operation. Heavy accumula­
tion of snow and ice should be
removed before activating the defro­
ster.
If several power consumers are
turned on simultaneously, or the
battery is only partially charged, it is
possible that the defroster automati­
cally turns itself off. When this
happens, the indicator lamp inside the
switch starts blinking. As soon as the
battery has sufficient voltage, the de­
froster automatically turns itself back
on.