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Controls in detail
Locking and unlocking
Checking the batteries
̈ Press button ‹ or Œ.
Battery check lamp 5 lights up briefly
to indicate that the key batteries are in
order.
Unlocking the trunk lid
You can unlock the trunk separately.
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.
̈ Press button Š until trunk opens.
The trunk can also be opened from its in-
side in an emergency, see “Trunk lid emer-
gency release” (
୴ page 89).
!
If you can no longer lock or unlock the
vehicle with the key, then either the
batteries in the SmartKey are dis-
charged, the key is malfunctioning or
the vehicle battery is drained.
ț Check the batteries in the key
(
୴ page 86) and replace them if
necessary (
୴ page 286).
ț Use the mechanical key to lock and
unlock the doors (
୴ page 285) and
the trunk lid (
୴ page 91) as re-
quired.
ț Check the vehicle battery
(
୴ page 303)
If the key is malfunctioning, contact an
authorized Mercedes-Benz Center.
!
If battery check lamp 5 does not light
up briefly during check, then the key
batteries are discharged.
Replace the batteries (
୴ page 286).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.
!
The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
i
If the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
୴ page 89). The
turn signals will flash three times to
confirm locking.
If the trunk lid was previously
separately locked (
୴ page 90), the
trunk lid will remain locked.