Page 25 of 290
22 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Ve h i c l e k e y s
Included with your vehicle are 2 remote controls with
folding master keys.Remote control with folding master key
The remote control operates all locks on the vehicle.
To release the key, press button (1). The key unfolds
from the holder by itself.
The transmitter for the remote control is located in the
key holder.
Wa r n i n g !
When leaving the vehicle always remove the key
from the steering lock, and lock your vehicle. Do
not leave children unattended in the vehicle, or
with access to an unlocked vehicle. Unsupervised
use of vehicle equipment may cause serious
personal injury.
1
Page 26 of 290

23 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Obtaining replacement keys
Your vehicle is equipped with a theft deterrent locking
system requiring a special key manufacturing process.
For security reasons, replacement keys can only be
obtained from your authorized Mercedes-Benz Center.
Start lock-out
Important!
Removing the key from the steering lock activates the
start lock-out. The engine cannot be started.
Turning the key in the steering lock to position 2
deactivates the start lock-out.
Note:
In case the engine cannot be started, and Á and
î are shown in the odometer display field, the
system is not operational. Contact an authorized
Mercedes-Benz Center or call 1-800-FOR-MERCedes (in
the USA), or 1-800-387-0100 (in Canada).General notes on the central locking system
If the key in the steering lock is in position 2, the
vehicle cannot be locked or unlocked with the remote
control.
If the vehicle cannot be locked or unlocked:
•Check the batteries of the remote control,
seepage236.
•Synchronize the remote control, see page 237.
Page 27 of 290
24 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Central locking system
Remote control
Due to the extended operational range of the remote
control, it could be possible to unintentionally lock or
unlock the vehicle by pressing the transmit button.
The vehicle doors, trunk, storage compartment in
armrest, and fuel filler flap can be centrally locked and
unlocked via remote control.
1Transmit button
‹ Locking
Œ Unlocking
2PANIC button
3Release button for master key
4Transmitter eye and lamp for battery check
Page 28 of 290

25 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Locking and unlocking with remote control
Unlocking:
Press transmit button Œ. All turn signal lamps blink
once to indicate that the vehicle is unlocked.
The remote control can be programmed for two kinds of
unlocking modes (see below):
Selective unlocking mode –
Press transmit button Œ once to unlock driver’s door,
storage compartment in armrest, and fuel filler flap.
Press transmit button Œ twice to unlock both doors,
storage compartment in armrest, fuel filler flap, and
trunk.
Global unlocking mode –
Press transmit button Œ once to unlock both doors,
storage compartment in armrest, fuel filler flap, and
trunk.
Notes:
The presently active unlocking mode (selective or
global) can only be determined by unlocking the vehicle
with the remote control (see below for changing mode).If within 40 seconds of unlocking with the remote
control, neither door is opened, the key is not inserted
in the steering lock, or the central locking switch is not
activated, the vehicle will automatically lock.
Locking:
Press transmit button ‹ once. All turn signal lamps
blink three times to indicate that the vehicle is locked.
If the turn signal lamps do not blink, a door or trunk is
not closed properly.
Note:
If the vehicle cannot be locked or unlocked by pressing
the transmit button, then it may be necessary to change
the batteries in the remote control (if ok, battery check
lamp in transmitter will light briefly when transmitting)
or to synchronize the remote control, see page 236
and 237.
Choosing global or selective mode on remote control
Press and hold transmit buttons ‹ and Œ
simultaneously for five seconds to reprogram the
remote control. Battery check lamp will blink two times
indicating the completed mode change.
Page 29 of 290
26 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Panic button
To activate press and hold button (1) for at least one
second. An audible alarm and blinking exterior lamps
will operate for approximately 3 minutes.
To deactivate press button (1) again, or turn key in
steering lock to position 2.Note:
For operation in the USA only: This device complies
with Part 15 of the FCC Rules. Operation is subject to
the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
Any unauthorized modification to this device could void
to the user’s authority to operate the equipment.
1
Page 30 of 290
27 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Mechanical keys
The mechanical keys fit all locks on the vehicle.
Remove the protective cap from the driver’s door lock
before inserting the mechanical key into the lock.Notes:
Use of the key does not operate the central locking
system or arm or disarm the antitheft alarm system.
The alarm sounds when unlocking the door. Cancel
alarm by turning key in steering lock to position 1, or
with the remote control by pressing buttonŒ
or‹.
Page 31 of 290
28 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Doors
1Opening – pull handle
2Unlocking
3Locking
4Individual door from inside:
•Push lock button down to lock.
•Pull inside door handle to unlock.The entire vehicle may be locked or unlocked by either
using the master key in driver’s door or trunk locks, or
central locking switch located in center console. The
master key also locks or unlocks the storage
compartment in the armrest, and the fuel filler flap.
Note:
If the fuel filler flap cannot be opened, see page 244.
Page 32 of 290

29 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index When you lock the vehicle, both door lock buttons
should move down. If any one stays up, the respective
door is not properly closed.
You should then unlock the vehicle, open and reclose
this door, and lock the vehicle again. Each individual
door can be locked with the respective door lock button
– the driver’s door can only be locked when it is closed.
If the vehicle has previously been locked from the
outside, only the door being opened from the inside will
unlock, and the alarm will come on. The other door, the
trunk, the storage compartment in armrest, and fuel
filler flap remain locked.Notes:
In case of a malfunction in the central locking system
the doors can be locked and unlocked individually.
To lock, turn key in driver’s door lock to position 3 or
push down lock buttons.
To unlock, turn key in driver’s door lock to position 2 or
pull inside door handles.