Charge Indicator Lamp; Oil Pressure Gauge; Engine Oil Consumption; Low Engine Oil Level - Mercedes-Benz 300D 2.5 1990 Owner's Manual

Charge Indicator Lamp

Should the charge indicator lamp fail
to come on prior to starting when the
key is in steering lock position 2 or
should it fail to go out after starting or
during operation, this indicates a fault
which must be repaired at an authori­
zed MERCEDES-BENZ dealer
immediately.
If the charge indicator lamp comes on
while the engine is running, this may
indicate that the poly-V-belt has
broken. Should this condition occur,
the poly-V-belt must be replaced
before continuing to operate the
vehicle. Otherwise, the engine will
overheat due to an inoperative water
pump which may result in damage to
the engine.
66

Oil Pressure Gauge

The oil pressure at idle speed may
drop to 0.3 bar (4.4 psi) if the engine is
at operating temperature. This will not
jeopardize its operational reliability.
Pressure must, however, rise imme­
diately upon acceleration.

Engine Oil Consumption

Engine oil consumption can only be
determined after a certain mileage has
been covered. During the break-in
period, higher oil consumption may be
noticed and is normal. Frequent
driving at high speeds results in
increased consumption.
Low Engine Oil Level Warning
Lamp
The warning lamp comes on with the
key in steering lock position 2 and
should go out when the engine is
running.
If the warning lamp comes on with the
engine running and at operating
temperature, the engine oil level has
dropped to approximately the mini­
mum mark on the dipstick. When this
occurs, the warning lamp will first
come on intermittently and then stay
on if the oil level drops further. If no oil
leaks are noted and there is no loss in
engine oil pressure, continue to drive
to the nearest service station where
the engine oil should be topped to the
"full" mark of the dipstick (see
page 74).
In addition to the warning lamp, the
engine oil level should be periodically
checked with the dipstick, for example
during a fuel stop, or before a long trip
(see page 74).