Mercedes-Benz GLC Owner's Manual page 381

Warning and indicator lamps in the instrument cluster
378
Warning/
indicator
lamp
J
N N Signal type
Possible causes/consequences and M M Solutions
N The red brake system warning lamp is lit while the engine is running.
PLUG-IN HYBRID vehicles: the red brake system warning lamp is shown in the
READY driving status.
A warning tone also sounds.
There is insufficient brake fluid in the brake fluid reservoir.
G WARNING
Braking efficiency may be impaired.
There is a risk of an accident.
Pull over and stop the vehicle safely as soon as possible, paying attention to
X
road and traffic conditions. Do not continue driving under any circumstan-
ces.
Safeguard the vehicle against rolling away (
X
Do not top up the brake fluid. Topping up will not rectify the fault.
X
Consult a qualified specialist workshop.
X
Observe the additional display messages in the multifunction display.
X
page 219).
Y