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Restoring to factory setting
Press and hold buttons Œ and ‹
simultaneously for about 6 seconds un-
til battery check lamp 5 flashes twice.
!
If you can no longer lock or unlock the
vehicle with the SmartKey with
KEYLESS-GO, then the batteries in the
SmartKey with KEYLESS-GO are dis-
charged, the SmartKey with
KEYLESS-GO is malfunctioning or the
vehicle battery is drained.
Check the batteries in the
SmartKey with KEYLESS-GO
( page 105) and replace them if
necessary ( page 435).
Use the mechanical key to unlock
the driver's door ( page 419) and
the trunk ( page 420).
Use the mechanical key to lock the
driver's door ( page 420) and the
trunk ( page 116).
Have the vehicle battery and the
battery connections checked
( page 453).
If the SmartKey with KEYLESS-GO is
malfunctioning, contact an authorized
Mercedes-Benz Center.
Checking the batteries
Press button ‹ or Œ.
Battery check lamp 5 comes on
briefly to indicate that the SmartKey
with KEYLESS-GO batteries are in or-
der.
!
If battery check lamp 5 does not
come on briefly during check, then the
SmartKey with KEYLESS-GO batteries
are discharged.
Replace the batteries ( page 435).
You can obtain the required batteries
at any authorized Mercedes-Benz
Center.
Controls in detail
Locking and unlocking
i
If the batteries are checked within sig-
nal range of the vehicle, pressing
the ‹ or Œ button will lock or
unlock the vehicle accordingly.
Global locking using the lock button on
the trunk lid
i
To prevent a possible inadvertent
lockout, the trunk will open
automatically if a SmartKey with
KEYLESS-GO* is recognized inside the
vehicle or in the trunk.
105
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