Mercedes-Benz 2003 M-Class Operator's Manual page 234

Practical hints
What to do if ...
Problem
< The red seat belt warning lamp
blinks for a brief period after
starting the engine.
W The yellow low washer system
fluid level lamp lights up after
starting the engine or while driv-
ing.
2 The yellow brake indicator lamp
lights up during braking or after
starting the engine.
!
Brake pad thickness must be visually
checked by a qualified technician at the
intervals specified in the Service book-
let.
234
Possible cause
The warning lamp 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
The brake pads are worn down.
Suggested solution
Fasten your seat belt ( page 60).
Add washer fluid ( page 208).
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.
Have the system checked at an autho-
rized Mercedes-Benz Light Truck
Center.