Mercedes-Benz 2003 M-Class Operator's Manual page 228

Practical hints
What to do if ...
Problem
É The red brake warning lamp
lights up while driving and you
hear a warning sound.
É The red brake warning lamp
lights up while driving.
Warning!
Driving with the brake warning lamp illumi-
nated can result in an accident. Have your
brake system checked immediately if the
brake warning lamp stays on. Don't add
brake fluid before checking the brake sys-
tem. Overfilling the brake fluid reservoir can
result in spilling brake fluid on hot engine
parts and the brake fluid catching fire. You
can be seriously burned.
228
Possible cause
You are driving with the parking brake set.
There is insufficient brake fluid in the reser-
voir.
!
G
If you find that the brake fluid in the
brake fluid reservoir has fallen to the
minimum mark or below, have the
brake system checked for brake pad
thickness and leaks.
Suggested solution
Release the parking brake
( page 45).
Risk of accident! Carefully stop the
vehicle and notify an authorized
Mercedes-Benz Light Truck Center.
Do not add brake fluid! This will not
solve the problem.