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Engine
Warning/
indicator
lamp
NN Signal type
Possible causes/consequences and MM Solutions
;
N The yellow Check Engine 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 (for vehicles with gasoline engines)
R
in the fuel system
The emission limit values may be exceeded and the engine may be in emergency
mode.
X
Visit a qualified specialist workshop immediately.
Vehicles with a diesel engine: the fuel tank has been run dry (Y page 153).
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.
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 require-
ments in effect in these states. If in doubt, check whether such legal regulations
apply in the state in which you are currently driving.
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
Refuel at the nearest gas station.
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 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.
?
N The red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the scale.
The temperature sensor for the coolant temperature gauge is malfunctioning.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
X
Pull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions. Do not continue driving under any circumstances.
X
Secure the vehicle against rolling away (Y page 156).
X
Consult a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
283
On-board computer and displays
Z
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