Mercedes-Benz G-Class Operator's Manual page 245

Warning and indicator lamps in the instrument cluster
Engine
Problem
;
The yellow Check
Engine warning lamp
lights up while the
engine is running.
8
The yellow reserve fuel
warning lamp lights up
while the engine is run-
ning.
8
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the ;
Check Engine warning
lamp may light up.
?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gage is at the
start of the scale.
Possible causes/consequences and M M Solutions
There may be a malfunction, for example:
in the engine management
R
in the fuel injection system
R
in the exhaust system
R
in the ignition system
R
in the fuel system
R
The emission limit values may be exceeded and the engine may be
in emergency mode.
Have the vehicle checked as soon as possible at a qualified
X
specialist workshop.
i In some states, you must immediately visit a qualified special-
ist workshop as soon as the yellow Check Engine warning lamp
lights up. This is due to the legal requirements in effect in these
states. If in doubt, check whether such legal regulations apply in
the state in which you are currently driving.
The fuel level has dropped into the reserve range.
Refuel at the nearest gas station.
X
The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
Check that the fuel filler cap is correctly closed.
X
If the fuel filler cap is not correctly closed: close the fuel filler
X
cap.
If the fuel filler cap is closed: visit a qualified specialist work-
X
shop.
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.
Pull over and stop the vehicle safely and switch off the engine,
X
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
Apply the parking brake.
X
Consult a qualified specialist workshop.
X
243
Z