Mercedes-Benz 2005 M-Class Operator's Manual page 262

Practical hints
What to do if ...
Problem
:
The yellow warning lamp flashes
after starting the engine or while
driving.
_
The red indicator lamp does not
go out after starting the engine.
‡
The green front fog lamp indica-
tor lamp lights up when ignition
is turned on.
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The red seat belt telltale
illuminates for a brief period
after starting the engine.
W
The yellow low washer system
fluid level lamp comes on after
starting the engine or while driv-
ing.
260
Possible cause
The engine oil level has sunk to the minimum
level. If the engine oil level continues to sink,
the warning lamp will light up.
The adjustable telescoping steering column
is not properly locked.
The front fog lamps are switched on.
The telltale reminds you to fasten seat belts.
There is approximately 1.3 US qt. (1.25 l) of
washer fluid remaining in the reservoir.
The washer fluid may have frozen.
Suggested solution
Add approved oil at the next gas
station ( page 314).
If oil loss is visible on the engine, have
the malfunction corrected as soon as
possible at a Mercedes-Benz Light
Truck Center.
Lock the adjustable steering column
( page 40).
Fog lamps ( page 111).
Fasten your seat belt ( page 64).
The telltale goes out.
Add washer fluid ( page 230).
Move the vehicle to a warmer environ-
ment so that the washer fluid will
thaw.
Correct the concentration level after
the washer fluid in the reservoir
thaws.