Emergency Running Mode - Mercedes-Benz 2015 M-Class Operator's Manual

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.
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 (for vehicles with gasoline engines)
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.
Vehicles with a diesel engine: the fuel tank has been run dry
( page 180).
Y
Start the engine three to four times after refueling.
X
If the yellow Check Engine warning lamp goes out, emergency
running mode is canceled. The vehicle need not be checked.
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.
327
Z