Mercedes-Benz GLK-Class 2015 Owners Manual - Manual (Page 270)

Problem Possible causes/consequences and M M Solutions
?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gauge is at the
start of the scale.
The temperature sensor for the coolant temperature gage is defec-
tive.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
X
Secure the vehicle against rolling away (
Y
page 168).
X Consult a qualified specialist workshop.
268
Warning and indicator lamps in the instrument cluster
On-board
computer
and
displays