Mercedes-Benz R 350 2012, Operator'S Manual

Page: 246 / 368

Engine
Problem Possible causes/consequences and
M
Solutions
!
(USA only)
;
(Canada only)
The yellow Check
Engine warning lamp
lights up while the
ignition is switched on
with the engine
running.
There may be a malfunction, for example:
R
in the engine management
R
in the fuel injection system
R
in the exhaust system
R
in the ignition system (for vehicles with a gasoline engine)
R
in the fuel system
The emission limit values may be exceeded and the engine may
be running in emergency mode.
X
Have the vehicle checked as soon as possible at a qualified
specialist workshop.
i In some states, you are required by law to immediately visit a
qualified specialist workshop as soon as the yellow Check
Engine warning lamp lights up. If in doubt, check whether such
legal regulations apply in the state/province in which you are
currently driving.
Vehicles with a diesel engine: the fuel tank has been run dry
(
Y
page 160).
X
Start the engine three to four times after refueling.
If the yellow Check Engine warning lamp goes out, emergency
running mode is canceled. The vehicle need not be checked.
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the
!
(USA only)/
;
(Canada only) yellow
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
Observe the additional display messages in the multifunction
display.
X
Check that the fuel filler cap is correctly closed.
X
If the fuel filler cap is not correctly closed: close the fuel filler
cap.
X If the fuel filler cap is closed: visit a qualified specialist
workshop.
The yellow reserve fuel
warning lamp lights up
while the engine is
running. The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station.
244
Warning and indicator lamps in the instrument cluster
On-board computer and displays