Mercedes-Benz 2009 GL320 BlueTEC Operator's Manual page 375

Problem
; (USA only)
3 (Canada only)
The red brake warning lamp
comes on while the engine is
running and you hear a warning
sound.
G Warning!
Driving with the brake warning lamp illuminated 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 engine parts and the brake fluid catching fire. You can be seriously
burned.
! 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.
Possible cause/consequence
There is insufficient brake fluid in
the reservoir.
Suggested solutions
X
Risk of accident! Do not drive any further. Stop the vehicle in a safe
location as soon as it is safe to do so.
X
Engage the parking brake.
X
Read and observe messages that may appear in the multifunction
display ( Y page 330).
X
Contact an authorized Mercedes-Benz Center. Do not add brake
fluid! This will not solve the problem.
Practical hints
What to do if ...
Z
373