Mercedes-Benz S-Class Operator's Manual page 341

Problem
;
The red brake warning
(USA only) lamp comes on while
driving and you hear a
3
warning sound.
(Canada only)
The red brake warning
lamp comes on 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. Do not add
brake fluid before checking the brake
system. Overfilling the brake fluid reservoir
can result in spilling brake fluid on hot en-
gine parts and the brake fluid catching fire.
You can be seriously burned.
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.
Practical hints
What to do if ...?
Suggested solution
Release the parking brake ( page 48).
Risk of accident!
Carefully stop the vehicle and notify an
authorized Mercedes-Benz Center. Do
not add brake fluid! This will not solve
the problem.
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