Outside Temperature Indicator; Brake Pad Wear Indicator Lamp; Brake Warning Lamp - Mercedes-Benz 420 SEL 1988 Owner's Manual

Outside Temperature Indicator

The temperature sensor is located in
the front bumper area. Due to its loca­
tion, the sensor can be affected by
road or engine heat during idling or
slow driving. This means that the
accuracy of the displayed tempera­
ture can only be verified by compar­
ison to a thermometer placed next to
the sensor, not by comparison to ex­
ternal displays (i.e., bank signs, etc.).
Adaptation to ambient temperature
takes place in steps and depends on
the prevailing driving conditions (stop
and go or moderate, constant driving)
and amount of temperature change.
Warning!
The outside temperature indicator
is not designed to serve as an Ice-
Warning-Device and is therefore
unsuitable for that purpose. Indi­
cated temperatures just above
freezing point do not guarantee
that the road surface is free of ice.
68

Brake Pad Wear Indicator Lamp

The brake pad wear indicator lamp in
the instrument cluster comes on when
the key is turned to steering lock posi­
tion 2 and it should go out when the
engine is running. If the indicator lamp
lights up during braking, this shows
that the front wheel brake pads are
worn.
Have the brake system checked at
your authorized MERCEDES-BENZ
dealer as soon as possible.

Brake Warning Lamp

The brake warning lamp will come on
if insufficient brake fluid is in the re­
servoir (key in steering lock position 2
and parking brake released).
When the minimum mark on the re­
servoir is reached, have the brake
system checked (brake pad thick­
ness, leaks).
To test the brake warning lamp, de­
press the parking brake pedal. Turn
key in steering lock to position 2 and
the brake warning lamp should come
on; release parking brake and the
lamp should go out.