Instruments - (Oil Level Indicator) Testing & Function

91mercedes04

REF. NO. 18/41


TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS

DATE: June 1991


SUBJECT: MODELS 107, 124, 126, 129 AND 201 (201 ENGINES WITH SINGLE DRIVE BELT ONLY)
A. FUNCTION/TESTING OF THE LOW OIL LEVEL INDICATOR
B. INFORMATION CONCERNING LOW OIL LEVEL INDICATOR LAMP/OIL CHANGE

Examination of returned oil level sensors often indicates no faults in the component. To avoid unnecessary removal, this S.I. explains the operation and testing of the oil level indicator.

A. Function/Testing of the Low Oil Level Indicator

1. Function The low oil level indicator monitors the oil level in the oil pan when the engine is running and when the oil temperature is over 60~ C (under 60~ C there is no low oil level indication). The indicator lamp comes on when the ignition is turned on, and goes out as soon as the engine is running.





Components

A1 Instrument cluster
S2/1 Ignition/start switch
(with gasoline engines only)
S2/2 Preglow/start switch
(with diesel engines only)
S43 Low oil level indicator
switch (oil level sensor with float and reed contact)
a Electronics
F1 Fuse and relay box
e12 Low oil level indicator
lamp





Test program