Page 73 of 360
i
If the alarm stays on for more than
30 seconds, the mbrace emergency call
system automaticall ysends amessage to
the Customer Assistance Center by text
message or data connection .The
emergency call system sends the message
provided that:
R you have subscribed to the mbrace
service.
R the mbrace service has been activated
properly.
R the necessary mobile phone network is
available. Theft deterrent locking system
71Safety Z
Page 74 of 360
Page 75 of 360
Useful information
..............................74
SmartKey ............................................. 74
Doors .................................................... 79
Cargo compartment ............................81
Side windows ...................................... 83
Panorama roof with power tilt/
sliding panel ........................................ 86 73Opening and closing
Page 76 of 360

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please not ethat your vehicle may
not be equipped with all features
described. This also applies to safety-
related system sand functions.
i Read the information on qualified
specialist workshops: (Y page 25).SmartKey
Important safet
ynotes G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle' sequipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parkin gbrake.
R shifting the automatic transmission out of
park position P
R Start the engine.
There is arisk of an acciden tand injury.
When leaving the vehicle, always tak ethe
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children. G
WARNING
If persons, particularly children are subjected
to prolonged exposur etoextreme heat or
cold, ther eisarisk of injury, possibly even
fatal. Never leave children unattended in the
vehicle. G
WARNING
If you attach heavy or large objects to the
SmartKey, the SmartKey could be
unintentionally turned in the ignition lock .This
could cause the engine to be switched off.
There is arisk of an accident.
Do not attach any heavy or large objectsto
the SmartKey. Remove any bulky key rings
before inserting the SmartKey into the
ignition lock.
! Keep the SmartKey away from strong
magnetic fields. Otherwise, the remote
control function could be affected.
Strong magnetic fields can occur in the
vicinity of powerful electrical installations.
Do not keep the SmartKey:
R with electronic devices, e.g. amobile
phone or another SmartKey
R with metallic objects, e.g. coins or metal
foil
R inside metallic objects, e.g. ametal case SmartKey functions
001A
0010 To lock the vehicle
0010 0009 To unlock the vehicle
X To unlock centrally: press button0010.
If you do not open the vehicle within
approximately 40 seconds of unlocking:
R the vehicle is locked again.
R the theft deterrent locking system is armed
again. 74
SmartKeyOpening and closing
Page 77 of 360

X
To lock centrally: press button001A.
The SmartKe ycentrall yloc ks/unlocks:
R the doors
R the tailgate
R the fuel fille rflap
The tur nsignals flash onc ewhen unlocking
and three times when locking.
i When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 204).
i You can also set an audible signal to
confirm that the vehicle has been locked.
The audible signal can be activated and
deactivated using the on-board computer
(Y page 205). Changing the settings of the locking
system
You can change the settings of the locking
system. When you then unlock the vehicle
only the driver's door and the fuel filler flap
are unlocked. This is useful if you frequently
travel on your own.
X To change the setting: press and hold
down the 0009and0010 buttons
simultaneously for approximately six
seconds until the battery check lamp
(Y page 76) flashes twice.
i If the settingoft he locking system is
changed within the signal range of the
vehicle, pressing the 0010or0009 button:
R locks or
R unlocks the vehicle
The SmartKey now functions as follows:
X To unlock the driver's door: press the
0009 button once.
X To unlock centrally: press the0009
button twice.
X To lock centrally: press the0010button.
X To restore the factory settings: press
and hold down the 0009and0010 buttons simultaneously for approximately six
seconds until the battery check lamp
flashes twice (Y
page 76). Mechanical key
General notes If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered (Y
page 70).
There are several waystot urn off the alarm:
X Press the 0009or0010 button on the
SmartKey.
or
X Insert the SmartKey into the ignition lock.
If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked
automatically.
X To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key X
Push release catch 001Ain the direction of
the arrow and at the same time remove
mechanical key 0010from the SmartKey. SmartKey
75Opening and closing Z
Page 78 of 360

For further information about:
R
unlocking the driver' sdoor(Ypage 81)
R unlocking the cargo compartment
(Y page 82)
R locking the vehicle (Y page 81)SmartKey battery
Importan tsafet ynotes G
WARNING
Batteries contain toxic and corrosive
substances. If batteries are swallowed, it can
result in severe health problems. There is a
risk of fatal injury.
Keep batteries out of the reach of children .If
ab attery is swallowed, seek medical attention
immediately.
The SmartKey batterie scontain perchlorate
material, whic hmay requir especial handling
and regard for the environment. National
guidelines must be observed during disposal.
In California, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Mercedes-Benz recommends that you have
the batteries replaced at aqualified specialist
workshop.
Checking the battery X
Press the 0010or0009 button.
The battery is workin gproperly if battery
chec klamp 001Alight supb riefly. The battery is discharged if battery check
lamp
001Adoes no tlight up briefly.
X Change the battery (Y page 76).
i If the SmartKey battery is checked within
the signal receptio nrang eoft hevehicle,
pressin gthe 0010 or0009 button:
R locks or
R unlock sthe vehicle
i You can get abattery at any qualified
specialist workshop.
Replacin gthe battery You require
aCR20253V cellbattery.
X Tak ethe mechanical ke yout of the
SmartKey (Y page 75). X
Press mechanical key 0010intot he opening
in th eSmartKey in th edirection of the
arrow until battery tray cover 001Aopens.
When doin gso, do no thold cover 001Ashut.
X Remove battery tray cover 001A.76
SmartKeyOpening and closing
Page 79 of 360
X
Repeatedly tap th eSmartKey against your
palm until battery 0023fallsout.
X Inser tthe new battery with the positive
terminal facing upwards. Use alint-free
cloth to do so.
X Make sure that the surface of the battery is
free from lint, grease and all other forms of
contamination.
X Insert the front tabs of battery tray
cover 001Aand then press to close it.
X Insert the mechanical key into the
SmartKey.
X Check the function of all SmartKey buttons
on the vehicle. SmartKey
77Opening and closing Z
Page 80 of 360

Problems with the SmartKey
Problem Possible causes/consequences and
000B Solutions
You cannot lock or
unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X
Try again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the 0009or
0010 button.
If this does not work:
X Check the SmartKey battery and replace it if necessary
(Y page 76).
X Unlock (Y page 81) or lock (Y page 81) the vehicle using the
mechanical key. There is interference from
apowerful source of radio waves.
X Try again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the 0009/
0010 button. The SmartKey is faulty.
X
Unlock (Y page 81) or lock (Y page 81) the vehicle using the
mechanical key.
X Have the SmartKey checked at aqualified specialist workshop. You have lost a
SmartKey. X
Have the SmartKey deactivated at aqualified specialist
workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 78
SmartKeyOpening and closing