82 Controls in detailLocking and unlocking
Checking the batteries
Press button
‹
or
Œ
.
The battery check lamp5 lights up
briefly to indicate that the key batteries
are in order.Unlocking the trunk lid
You can unlock the trunk separately.
Press and hold button
Š
until trunk
unlocks.
!If you can no longer lock or unlock the
vehicle with the key, then either the
batteries in the electronics are dis-
charged or the key is malfunctioning.
Check the batteries in the key
(page 82) and replace them if
necessary (
page 293).
or
Use the mechanical key to unlock
the doors (
page 290) and trunk
(
page 291) as required. Lock the
vehicle using the mechanical key
(page 292).
If the key is malfunctioning, contact an
authorized Mercedes-Benz Center.
!If the battery check lamp5 does not
light up briefly during check then the
key batteries are discharged.
Change the batteries (
page 293).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.
iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed. The turn signals will
flash three times to confirm locking.
269 Practical hints
What to do if …
Left display
Right display
Possible cause
Possible solution
F
Chip card
Check battery!
The KEYLESS-GO* card batteries are
discharged.
Change the batteries (
page 294).
Chip card
not recognised!
The KEYLESS-GO* card is not recog-
nized while the engine is running be-
cause
the card is not in the vehicle
there is strong radio-frequency
interference
Stop the vehicle as soon as it is safe to do
so.
Search for the card or continue to operate
the vehicle with the key.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started again
after the engine is stopped.
The KEYLESS-GO* card is momen-
tarily not recognized.
Change the position of the card in the vehi-
cle.
Operate the vehicle with the key if neces-
sary.
Chip card
still in vehicle!
A KEYLESS-GO* card left in the vehi-
cle was recognized while locking the
vehicle from the outside.
Take the card out of the vehicle.
KEYLESS-GO
Visit workshop!
The KEYLESS-GO* system is mal-
functioning.
Visit an authorized Mercedes-Benz Center
as soon as possible.
