Mercedes-Benz G-Class 2012 Owners Manual - Manual (Page 182)

Safety systems
Problem Possible causes/consequences and M Solutions
$ (USA only)
J (Canada only)
The red brake system
warning lamp comes on
while the vehicle is
moving. A warning tone
also sounds. You are driving with the parking brake applied.
X Release the parking brake.
The warning lamp goes out and the warning tone ceases.
$ (USA only)
J (Canada only)
The red brake system
warning lamp comes on
while the engine is
running. G Risk of accident
There is not enough brake fluid in the brake fluid reservoir.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Engage the parking brake.
X Consult a qualified specialist workshop immediately.
X Observe the additional display messages in the multifunction
display.
Do not add brake fluid. This will not rectify the malfunction.
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.
180
Warning and indicator lamps in the instrument cluster
On-board computer and displays