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Practical hints
What to do if …
Display symbol Display messages Possible cause/consequence Possible solution
F
Change
key batteries
The SmartKey with KEYLESS-GO* batter-
ies are discharged.
̈ Replace the batteries (୴ page 402).
Key
not detected
The SmartKey with KEYLESS-GO* is not
recognized while the engine is running
because
ț the SmartKey with KEYLESS-GO* is
not in the vehicle
ț there is strong radio-frequency inter-
ference
̈ Stop the vehicle as soon as it is safe to
do so.
̈ Search for the SmartKey.
Otherwise the vehicle cannot be cen-
trally locked nor can the engine be
started again after the engine is
stopped.
Key
not detected
The SmartKey with KEYLESS-GO* is mo-
mentarily not recognized.
̈ Change the position of the SmartKey in
the vehicle.
̈ Operate the vehicle with the SmartKey
in the starter switch if necessary.
.
Active headlamps
inoperative
The active Bi-Xenon* headlamp system is
malfunctioning.
̈ Contact an authorized Mercedes-Benz
Center as soon as possible.
Active headlamps
The active Bi-Xenon* headlamps are mal-
functioning.
̈ Contact an authorized Mercedes-Benz
Center as soon as possible.