Exterior Light Failure Indicator Lamp; Fuel Reserve Warning Lamp; Coolant Temperature Gauge; Indicator Lamp - Mercedes-Benz 420 SEL 1988 Owner's Manual

Exterior Light Failure Indicator
Lamp
The light failure indicator comes on
with the key in steering lock position 2
and will go out when the engine
starts.
If it comes on with the engine running,
it indicates a light failure.
If an exterior light fails, the indicator
will come on only when that light is
switched on.
If a brake or turn signal light fails, the
light failure indicator will come on
when applying the brake or actuating
the turn signal and stay on until the
engine is turned off.
Caution!
If additional lighting equipment is in­
stalled (e.g. auxiliary headlamps etc.),
be certain to connect into the fuse
before the failure indicator monitoring
unit in order to avoid damaging the
system.

Fuel Reserve Warning Lamp

The fuel reserve warning lamp will
come on when the key is turned to
steering lock position 2, and will go
out after the engine is running.
If the warning lamp stays on after
the engine starts, or comes on while
driving, it indicates that the fuel level
is down to the reserve quantity (12.5 I
[3.3 US gal]).

Coolant Temperature Gauge

If the antifreeze mixture is effective to
-30° C (-22° F), the boiling point of
the coolant in the pressurized cooling
system of your vehicle is approx.
125° C (257° F) (see also " Fuels, Cool­
ants, Lubricants, etc.").
During severe operating conditions
and stop-and-go city traffic, the cool­
ant temperature may rise close to the
red marking.
Low Engine Coolant Level Indicator
Lamp
The indicator lamp comes on with the
key in steering lock position 2, and
should go out when the engine is run­
ning.
If it comes on with the engine running,
the coolant has dropped below the
required level. If no leaks are notice­
able and the engine temperature does
not increase, continue to drive to the
nearest service station and have cool­
ant added to the coolant system (see
page 76).
Low Windshield and Headlamp
Washer Fluid Level Indicator Lamp
The indicator lamp comes on with the
key in steering lock position 2 and
should go out when the engine is run­
ning.
If the indicator lamp comes on with
the engine running, the level of the
reservoir has dropped 14 of the total
volume. The reservoir should be re­
filled with MB Windshield Washer
Concentrate "S" and water (or com­
mercially available premixed wind­
shield washer solvent, depending on
ambient temperature) at the next
opportunity. The reservoir for the
windshield and headlamp washer
system is located in the engine com­
partment (see page 116).
67