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Practical hints
What to do if …?
Display Possible cause Suggested solution
F
Key
do not forget key
This display appears (for a maximum of
60 seconds) if the driver’s door is opened
with the engine shut off and no key in the
starter switch.
Message is only a reminder.
̈ Insert key in the starter switch.
̈ Take the SmartKey with KEY-
LESS-GO* with you when leaving the
vehicle.
B
Coolant
Check level
The coolant level is too low. ̈ Add coolant (୴ page 256).
̈ If you have to add coolant frequently,
have the cooling system checked by
an authorized Mercedes-Benz Center.
Warning! G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You can be seriously burned.
!
Do not ignore the low engine coolant
level warning. Extended driving with
the message and symbol displayed
may cause serious engine damage not
covered by the Mercedes-Benz Limited
Warranty.
Do not drive without sufficient amount
of coolant in the cooling system. The
engine will overheat, causing major en-
gine damage.