Mercedes-Benz 300 E 1990 Owner's Manual page 68

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 opera­
tion, this indicates a fault which
must be repaired at an authorized
MERCEDES-BENZ dealer imme­
diately.
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 over­
heat 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 tempera­
ture. This will not jeopardize its
operational reliability.
Pressure must, however, rise
immediately upon acceleration.
Note:
If the oil pressure warning lamp
does not go out after starting the
engine or comes on while driving
and the oil pressure gauge needle
drops to " 0 " , then damage to the
engine may occur with continued
operation. Turn off engine imme­
diately and contact an authorized
MERCEDES-BENZ dealer. Do not
operate the car until the condition
is repaired.
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 en­
gine is running.
If the warning lamp comes on with
the engine running and at opera­
ting temperature, the engine oil
level has dropped to approxi­
mately the minimum 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, con­
tinue to drive to the nearest
service station where the engine
oil should be topped to the ''fu ll"
mark of the dipstick (see
page 78).
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 78).