Rear Window Defroster - Mercedes-Benz 420 SEL 1988 Owner's Manual

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 in the
switch will come on.
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 will auto­
matically turn 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.