Mercedes-Benz G-Class 2011 Owners Manual - Manual (Page 190)

Engine
Problem Possible causes/consequences and M Solutions
! (USA only)
; (Canada only)
The yellow engine
diagnostics warning
lamp lights up while the
engine is 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
R
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/provinces, 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.
! (USA only)
; (Canada only)
The yellow engine
diagnostics warning
lamp lights up while the
engine is running. The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
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 filler cap is not correctly closed.
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.
188
Warning and indicator lamps in the instrument cluster
On-board computer and displays