Mercedes-Benz 500 SEC Operator's Manual page 69

Rear Window Defroster
The switch is located in the center
console.
Turn key in steering lock to
position I or 2.
When activating the rear window
defroster, 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 minutes of
operation.
Heavy accumulation of snow and ice
should be removed before activating
the defroster.
If several power consumers are turned
on simultaneously, or the battery is
only partially charged, it is possible
that the defroster will automatically
turn itself off. When this happens, the
indicator lamp inside the switch starts
blinking.
As soon as the battery has sufficient
voltage, the defroster automatically
turns itself back on.
Setting Clock
Adjusting clock one minute ahead or
back:
Pull out adjustment knob (1), briefly
turn to the right respectively left and
release knob.
Adjusting clock more than one minute
ahead or back: Pull out adjustment knob
(1), turn to the right respectively left
and hold until the desired time is set.
Within the first 2 seconds, the minute
hand advances 8 minutes and advances
another 8 minutes every additional
second thereafter.
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