Mercedes-Benz 2005 M-Class Operator's Manual page 263

Problem
#
The red charge indicator lamp
comes on when the engine is
running.
2
The yellow brake indicator lamp
comes on during braking or after
starting the engine.
!
Brake pad thickness must be visually
checked by a qualified technician at the
intervals specified in the Maintenance
Booklet.
Possible cause
The battery is no longer charging.
Possible causes:
alternator malfunctioning
broken poly-V-belt
The brake pads are worn down.
Practical hints
What to do if ...
Suggested solution
Stop immediately and check the
poly-V-belt.
If it is broken
Do not continue to drive, before the
poly-V-belt is replaced.
Notify an authorized Mercedes-Benz
Light Truck Center.
Have the system checked at an autho-
rized Mercedes-Benz Light Truck
Center.
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