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Practical hints
What to do if …?
Display Possible cause/consequence Possible solution
t
FUNCTION
UNAVAILABLE
This display appears if button t or
s on the multifunction steering wheel
is pressed and the vehicle is not equipped
with a telephone.
A
TANK OPEN
CHECK FILLER CAP
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.
̈ Check the fuel cap (୴ page 270).
If it is not closed properly:
̈ Close the fuel cap.
If it is closed properly:
̈ Have the fuel system checked by an au-
thorized Mercedes-Benz Center.
Ê
TRUNK OPEN
This message will appear whenever the
trunk is open.
̈ Close the trunk.
W
WASHER FLUID
CHECK LEVEL
The fluid level has dropped to about
1
/
3
of total reservoir capacity.
̈ Add washer fluid (୴ page 282).