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4
Gas cap is open
±
Possible cause/consequence
A loss of pressure has been detected in
the fuel system. The fuel cap may not be
closed properly or the fuel system may be
leaky.
Certain electronic systems are unable to
relay information to the control system.
The following systems may have failed:
Coolant temperature display
Tachometer
Cruise control display
Practical hints
What to do if ...?
Possible solution
Check the fuel cap ( page 312).
If it is not closed properly:
Close the fuel cap.
If it is closed properly:
Have the fuel system checked by an
authorized Mercedes-Benz Center.
Have the electronic systems checked
by an authorized Mercedes-Benz Cen-
ter.
393
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