Engine Indicators - Mercedes-Benz S-Class Operator's Manual

Warning and indicator lamps in the instrument cluster
308
Engine
Warning/ N N Signal type
indicator
Possible causes/consequences and M M Solutions
lamp
;
N The yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction, for example:
R
R
R
R
R
The emission limit values may be exceeded and the engine may be in
emergency mode.
X
i
8
N The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
X
8
N The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the ; Check Engine warning lamp may light up.
The fuel system pressure is too low. The fuel filler cap is not closed correctly
or the fuel system is leaking.
X
X
X
in the engine management
in the fuel injection system
in the exhaust system
in the ignition system (for vehicles with gasoline engines)
in the fuel system
Have the vehicle checked as soon as possible at a qualified specialist
workshop.
In some states, you must immediately visit a qualified specialist 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.
Refuel at the nearest gas station.
Check that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed: close the fuel filler cap.
If the fuel filler cap is closed: visit a qualified specialist workshop.