40 Getting startedUnlockingSmartKeyStarter switch0For removing SmartKey
1Power supply for some electrical con-
sumers, such as seat adjustment
2Ignition (power supply for all electrical
consumers) and driving position
All lamps (except high beam headlamp
indicator lamp and turn signal indicator
lamps unless activated) in the instru-
ment cluster come on. If a lamp in the
instrument cluster fails to come on
when the ignition is switched on, have
it checked and replaced if necessary.If a lamp in the instrument cluster re-
mains on after starting the engine or
comes on while driving, refer to “Lamps
in the instrument cluster”
(
page 332).
3Starting position
SmartKey with KEYLESS-GO*
KEYLESS-GO start/stop button1USA only
2Canada only
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When you switch on the ignition, the indica-
tor and warning lamps (except high beam head-
lamp indicator lamp and turn signal indicator
lamps unless activated) in the instrument cluster
come on. The indicator and warning lamps (ex-
cept high beam headlamp indicator lamp and
turn signal indicator lamps if activated) should go
out when the engine is running. This indicates
that the respective systems are operational.
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The SmartKey can only be removed from the
starter switch with the gear selector lever in
position P.
!
If the SmartKey cannot be turned in the
starter switch, the starter battery may not be
sufficiently charged.
Check the starter battery and charge it if
necessary (
page 414).
Get a jump start (
page 419).
To prevent accelerated battery discharge or a
completely discharged battery, always remove
the SmartKey from the starter switch when the
engine is not in operation.
96 Safety and SecurityAnti-theft systemsImmobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
Activating
With the SmartKey
Remove the SmartKey from the starter
switch.
With KEYLESS-GO*
Press the start/stop button on the gear
selector lever once.
The engine is turned off.
Open the driver’s door.Deactivating
With the SmartKey
Turn the SmartKey in the starter switch
to position2 (
page 40).
With KEYLESS-GO*
Switch on the ignition (
page 41).
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens
a door
the trunk lid
the hood
a storage compartment in the rear
the glove box
the storage compartment under the
armrest
The alarm will stay on, even if the activat-
ing element (a door, for example) is imme-
diately closed.
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Starting the engine will also deactivate the
immobilizer.
In case the engine cannot be started (yet the
vehicle’s battery is charged), 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).
104 Controls in detailLocking and unlockingSelective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey so that
pressingŒ only unlocks the driver’s
door, interior lockable storage compart-
ments and the fuel filler flap.
Press and hold buttons Œ and
‹simultaneously for about
6 seconds until battery check lamp5
flashes twice.
The SmartKey will then function as fol-
lows:
Unlocking driver’s door and fuel filler
flap
Press button Œ once.
All turn signals flash once. The locking
knob in the driver’s door moves up.
The anti-theft alarm system is disarmed.Global unlocking
Press button Œ twice.
All turn signals flash once. The locking
knobs in the doors move up. The anti-theft
alarm system is disarmed.
Global locking
Press button ‹.
All turn signals flash three times. The lock-
ing knobs in the doors move down.
The anti-theft alarm system is armed.
Restoring to factory setting
Press and hold buttons Œ and ‹
simultaneously for about 6 seconds
until battery check lamp5
(page 102) flashes twice.
!
If you can no longer lock or unlock the vehi-
cle with the SmartKey, then the batteries in the
SmartKey are discharged, the SmartKey is mal-
functioning or the vehicle battery is drained.
Check the batteries in the SmartKey
(page 105) and replace them if necessary
(page 395).
Use the mechanical key to unlock the driv-
er’s door (
page 391) and the trunk
(
page 117).
Have the vehicle batteries and their connec-
tions checked (
page 414).
Use the mechanical key to lock or unlock the
doors (
page 393).
If the SmartKey is malfunctioning, contact an
authorized Mercedes-Benz Center.
105 Controls in detail
Locking and unlocking
Checking the batteries
Press button ‹or Œ.
Battery check lamp5 (
page 102)
comes on briefly to indicate that the
SmartKey batteries are in order.Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:
Have the SmartKey deactivated by an
authorized Mercedes-Benz Center.
Report the loss of the SmartKey or the
mechanical key to your car insurance
company immediately.
If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
SmartKey with KEYLESS-GO*
Vehicles equipped with KEYLESS-GO come
with two SmartKeys with KEYLESS-GO,
each with remote controls and a remov-
able mechanical key.
The locking tabs for the mechanical key
portion of the two SmartKeys with
KEYLESS-GO are a different color to help
distinguish each SmartKey with
KEYLESS-GO unit.
The function of the SmartKey overrules the
KEYLESS-GO function.
The KEYLESS-GO function is integrated
into the SmartKey. On these vehicles, the
validity of the SmartKey with KEYLESS-GO
is checked every time you grasp a door
handle.
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If battery check lamp5 does not come on
briefly during check, then the SmartKey batter-
ies are discharged.
Replace the batteries (
page 395).
You can obtain the required batteries at any
authorized Mercedes-Benz Center.
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If the batteries are checked within signal
range of the vehicle, pressing the‹orŒ
button will lock or unlock the vehicle according-
ly.
109 Controls in detail
Locking and unlocking
Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey with
KEYLESS-GO so that grasping an outside
door handle only unlocks the driver’s door,
interior lockable storage compartments
and the fuel filler flap.
Press and hold buttons Œ and ‹
simultaneously for about 6 seconds
until battery check lamp5
(page 106) flashes twice.
The SmartKey with KEYLESS-GO will
then function as follows:Unlocking the driver’s door and fuel fill-
er flap
Grasp the driver’s door handle.
All turn signals flash once. The locking
knob in the driver’s door moves up. The
anti-theft alarm system is disarmed.
Global unlocking
Grasp the door handle on the passen-
ger side.
All turn signals flash once. The locking
knobs in the doors move up. The
anti-theft alarm system is disarmed.
Global locking
Press lock button on an outside door
handle or the trunk lid.
With the trunk and all doors closed, all
turn signals flash three times. The lock-
ing knobs in the doors move down.
The anti-theft alarm system is armed.Restoring to factory setting
Press and hold buttons Œ and ‹
simultaneously for about 6 seconds
until battery check lamp5
(page 106) flashes twice.
!
If you can no longer lock or unlock the vehi-
cle with the SmartKey with KEYLESS-GO, then
the batteries in the SmartKey are discharged,
the SmartKey with KEYLESS-GO is malfunction-
ing or the vehicle battery is drained.
Check the batteries in the SmartKey with
KEYLESS-GO (
page 105) and replace
them if necessary (page 395).
Use the mechanical key to unlock the driv-
er’s door (
page 391) and the trunk
(
page 117).
Have the vehicle batteries and their connec-
tions checked (
page 414).
Use the mechanical key to lock or unlock the
doors (
page 393).
If the SmartKey with KEYLESS-GO is malfunc-
tioning, contact an authorized Mercedes-Benz
Center.
110 Controls in detailLocking and unlockingGlobal locking using the lock button on
the trunk lid
1Lock button
Press lock button 1 on the trunk lid.
With the trunk and all doors closed, all
turn signals flash three times. The lock-
ing knobs in the doors move down.
The anti-theft alarm system is armed.
Checking the batteries
Press button ‹or Œ.
Battery check lamp5 (
page 106)
comes on briefly to indicate that the
SmartKey batteries are in order.Loss of SmartKey with KEYLESS-GO
If you lose your SmartKey with
KEYLESS-GO, you should do the following:
Have the SmartKey with KEYLESS-GO
deactivated by an authorized
Mercedes-Benz Center.
Report the loss of the SmartKey with
KEYLESS-GO or the mechanical key to
your car insurance company immedi-
ately.
Have the mechanical lock replaced if
necessary.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
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Vehicles with KEYLESS-GO*: To prevent a
possible inadvertent lockout, the trunk lid will
open automatically if a SmartKey with
KEYLESS-GO is recognized inside the trunk.
When the hardtop is retracted, it must be com-
pletely lowered in the trunk before the trunk lid
can be closed (
page 242).
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You can also lock the vehicle using the lock
button on an outside door handle (
page 64).
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If battery check lamp5 (
page 106) does
not come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 395).
You can obtain the required batteries at any
authorized Mercedes-Benz Center.
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If the batteries are checked within signal
range of the vehicle, pressing the‹orŒ
button will lock or unlock the vehicle according-
ly.
118 Controls in detailLocking and unlockingIllumination of the emergency release but-
ton:
The button flashes for 30 minutes after
opening the trunk.
The button flashes for 60 minutes after
closing the trunk.
Power closing assist for trunk lid
It is not necessary to slam the trunk lid
closed. A electrical power-assisted mecha-
nism draws trunk lid closed quietly and au-
tomatically once trunk lid has been
latched. When the pneumatic power-as-
sisted mechanism has stopped, trunk can
be re-opened.Power closing assist for trunk lid
Press the trunk lid gently into its lock.
The trunk closes automatically.
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The emergency release button unlocks and
opens the trunk while the vehicle is standing still
or in motion.
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The emergency release button does not
open the trunk lid if the vehicle battery is dis-
charged or disconnected.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the trunk
lid opening when closing the trunk. Be espe-
cially careful when small children are
around.
In case of danger, pull the inside or outside
door handle, or press the trunk lid lock.
To prevent personal injury, never actuate
the closing assist mechanism by tampering
with the door or trunk lid latch.
Warning!
G
Only drive with the trunk closed as, among
other dangers such as blocked visibility, ex-
haust fumes may enter the vehicle interior.
244 Controls in detailUseful featuresTele Aid The Tele Aid system
(Tele
matic A
larm I
dentification on D
e-
mand)
The Tele Aid system consists of three
types of response:
Automatic and manual emergency
Roadside Assistance
Information
The Tele Aid system is operational provid-
ing that the vehicle’s battery is charged,
properly connected, not damaged and cel-
lular and GPS coverage is available.
The speaker volume of a Tele Aid call can
be adjusted when using the volume control
on the multifunction steering wheel. To
raise, press buttonæ and to lower,
press buttonçor use the volume knob
on your COMAND headunit.
To activate, press the SOS button, the
Roadside Assistance button• or
the Information button¡, depend-
ing on the type of response required.Shortly after the completion of your Tele
Aid acquaintance call, you will receive a
user ID and password. By visiting
www.mbusa.com and selecting “Tele Aid”
(USA only), you will have access to account
information, remote door unlock, and
more.
System self-check
Initially, after switching on the ignition,
malfunctions are detected and indicated
(the indicator lamps in the SOS button, the
Roadside Assistance button• and the
Information button¡ stay on longer
!
The initial activation of the Tele Aid system
may only be performed by completing the sub-
scriber agreement and placing an acquaintance
call using the ¡ button. Failure to complete
either of these steps will result in a system that
is not activated.
If you have any questions regarding activation,
please call the Response Center at
1-800-756-9018 (in the USA) or
1-888-923-8367 (in Canada).
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The SOS button is located above the interior
rear view mirror (
page 246).
The Roadside Assistance button• and the
Information button¡ are located below the
center armrest cover (page 234).
!
The Tele Aid system utilizes the cellular net-
work for communication and the GPS (Global Po-
sitioning System) satellites for vehicle location. If
either of these signals are unavailable, the Tele
Aid system may not function and if this occurs,
assistance must be summoned by other means.