38 Getting startedUnlockingSmartKeyStarter switch0For removing SmartKey
1Power supply for some electrical con-
sumers, such as seat adjustment2Ignition (power supply for all electrical
consumers) and driving position.
All lamps (except low beam headlamp
indicator lamp, high beam headlamp in-
dicator 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 instrument cluster” (
page 380).
3Starting position
For information on starting the engine us-
ing the SmartKey, see “Starting with the
SmartKey” (
page 52).
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When you switch on the ignition, the indica-
tor and warning lamps (except low beam head-
lamp indicator lamp, high beam headlamp
indicator lamp, and turn signal indicator lamps
unless activated) in the instrument cluster come
on. The indicator and warning lamps (except low
beam headlamp indicator lamp, high beam head-
lamp indicator lamp, and turn signal indicator
lamps if activated) should go out when the en-
gine 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
positionP.
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If the SmartKey is left in starter switch
position0 for an extended period of time, it can
no longer be turned in the switch. In this case,
the steering is locked. To unlock, remove
SmartKey from the starter switch and reinsert.
!
If the SmartKey cannot be turned in the
starter switch, the battery may not be
sufficiently charged.
Check the battery and charge it if necessary
(page 462).
Get a jump start (
page 464).
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.
106 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*
Turn off the engine by means of the
start/stop button on the gear selector
lever.
Open the driver’s door.Deactivating
With the SmartKey
Switch on the ignition (
page 38).
With KEYLESS-GO*
Start the engine by means of the
start/stop button on the gear selector
lever.
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
the hood
The alarm will stay on, even if the activat-
ing element (a door, for example) is imme-
diately closed.
The alarm system will also be triggered
when
the vehicle is opened using the
mechanical key
someone opens a door from the inside
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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).
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If the alarm stays on for more than
30 seconds, a call to the Response Center is ini-
tiated automatically by the Tele Aid system*
(
page 294) provided Tele Aid service was sub-
scribed to and properly activated, and that nec-
essary cellular service and GPS coverage are
available.
111 Controls in detail
Locking and unlocking
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it
with you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. It is possible
for children to open a looked door from the
inside, which could result in an accident
and/or serious personal injury.i
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 interfer-
ence, and
(2) this device must accept any interference re-
ceived, including interference that may
cause undesired operation.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
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Canada only:
This device complies with RSS-210 of Industry
Canada. Operation is subject to the following
two conditions:
(1) This device may not cause interference, and
(2) this device must accept any interference re-
ceived, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
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You can also open and close the windows
and tilt/sliding sunroof or tilt/sliding panel* us-
ing the SmartKey (
page 239).
!
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 and re-
place them if necessary (
page 441).
Use the mechanical key to unlock the
driver’s door (
page 436) and the trunk
(
page 437).
Use the mechanical key to lock the driver’s
door (
page 437) and the trunk
(
page 126).
Have the vehicle battery checked by an
authorized Mercedes-Benz Center.
If the SmartKey is malfunctioning, contact an
authorized Mercedes-Benz Center.
115 Controls in detail
Locking and unlocking
Important notes on using KEYLESS-GO
You can also use the SmartKey with
KEYLESS-GO like a normal SmartKey
(page 110).
You can combine KEYLESS-GO func-
tions with normal SmartKey functions
(e.g. unlocking with KEYLESS-GO and
locking with button ‹).
Always carry the SmartKey with
KEYLESS-GO with you.
Never store the SmartKey with
KEYLESS-GO together with:
Electronic items such as a cellular
phone or another SmartKey with
KEYLESS-GO
Metallic objects such as coins or
metal foil
Doing so could impair the function of
the KEYLESS-GO system.
To lock or unlock the vehicle, the
SmartKey with KEYLESS-GO must be
located outside the vehicle within ap-
proximately 3 ft (1 m) of a door or the
trunk lid.
In order to start the engine with the
SmartKey with KEYLESS-GO:
The SmartKey with KEYLESS-GO
must be located in the vehicle.
The brake pedal must be firmly de-
pressed. Do not depress the accel-
erator.
If the SmartKey with KEYLESS-GO is
positioned farther away from the vehi-
cle, the system may no longer recog-
nize the SmartKey with KEYLESS-GO.
The vehicle cannot be locked or the
engine started via the KEYLESS-GO
system.
If the SmartKey with KEYLESS-GO is re-
moved from the vehicle (e.g. if passen-
ger exits the vehicle with the SmartKey
with KEYLESS-GO)
!
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 and replace them if necessary
(page 441).
Use the mechanical key to unlock the driv-
er’s door (
page 436) and the trunk
(
page 437).
Use the mechanical key to lock the driver’s
door (
page 437) and the trunk
(
page 126).
Have the vehicle battery checked by an au-
thorized Mercedes-Benz Center.
If the SmartKey with KEYLESS-GO is malfunc-
tioning, contact an authorized Mercedes-Benz
Center.
119 Controls in detail
Locking and unlocking
Checking batteries in the SmartKey or SmartKey with KEYLESS-GO*
Press button‹ orŒ.
The battery check lamp (
page 110)
or (
page 114) comes on briefly to in-
dicate that the SmartKey or SmartKey
with KEYLESS-GO batteries are in or-
der.Loss of the SmartKey or SmartKey with
KEYLESS-GO*
If you lose your SmartKey, SmartKey with
KEYLESS-GO or mechanical key, you
should do the following:
Have the SmartKey or SmartKey with
KEYLESS-GO deactivated by an autho-
rized Mercedes-Benz Center.
Report the loss of the SmartKey,
SmartKey with KEYLESS-GO or the me-
chanical key immediately to your car
insurance company.
Have the mechanical lock replaced if
necessary.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
Opening the doors from the inside
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
1Locking knob
2Inside door handle
!
If the battery check lamp does not come on
briefly during check, the SmartKey or SmartKey
with KEYLESS-GO batteries are discharged.
Replace the batteries (
page 441).
You can obtain the required batteries at any au-
thorized Mercedes-Benz Center.
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If the batteries are checked within signal
range of the vehicle, pressing button‹ or
Œ will lock or unlock the vehicle accordingly.
126 Controls in detailLocking and unlockingIllumination of the emergency release but-
ton:
The button will flash for 30 minutes af-
ter opening the trunk.
The button will flash for 60 minutes af-
ter closing the trunk.
Valet locking
1Neutral position
2Locked
Close the trunk (
page 122).
Remove the mechanical key from the
SmartKey (
page 436).
Insert the mechanical key in the trunk
lid lock.
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The emergency release button does not
open the trunk, if the vehicle battery is dis-
charged or disconnected.
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If the vehicle has previously been locked us-
ing the SmartKey or KEYLESS-GO*, opening the
trunk from the inside using the emergency re-
lease button will trigger the anti-theft alarm sys-
tem.
To cancel the alarm, do one of the following:
Insert the SmartKey or the SmartKey with
KEYLESS-GO* in the starter switch.
Press button Œ or ‹ on the SmartKey
or the SmartKey with KEYLESS-GO*.
In vehicles with KEYLESS-GO*:
Pull an outside door handle.
The SmartKey with KEYLESS-GO* must be
within 3 ft (1 m) of the vehicle.
Press the KEYLESS-GO* start/stop button
(page 39).
The SmartKey with KEYLESS-GO* must be
inside the vehicle.
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To deny any unauthorized person access to
the trunk, e.g. when you valet park the vehicle,
lock it separately with the mechanical key. Leave
only the SmartKey or SmartKey with
KEYLESS-GO* less its mechanical key with the
vehicle.
145 Controls in detail
Lighting
Interior lighting in the front
The controls are located in the overhead
control panel.1Left front reading lamp on/off
2Automatic control on/off
3Rear interior lighting on/off
4Right front reading lamp on/off
5Front interior lighting on/off
6Interior lighting
7Ambient lighting
8Front reading lamps
Deactivating automatic control
Press switch2.
The interior lighting remains switched
off in darkness, even when you:
unlock the vehicle
remove the SmartKey from the
starter switch
open a door
open the trunk
Activating automatic control
Press switch2.
The interior lighting switches on in
darkness, when you:
unlock the vehicle
remove the SmartKey from the
starter switch
open a door
open the trunk
The interior lighting switches off after a
preset time (
page 176).
!
An interior lamp switched on manually does
not go out automatically.
Leaving an interior lamp switch in the ON posi-
tion for extended periods of time with the engine
turned off could result in a discharged battery.
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The interior lighting is factory-set to auto-
matic mode.
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If a door remains open, the interior lighting
switches off automatically after approximately
5minutes.
An interior lamp switched on manually does not
go out automatically.
244 Controls in detailPower tilt/sliding sunroofStopping the power tilt/sliding sunroof
during Express-operation
Move the sunroof switch in any direc-
tion.Synchronizing the power tilt/sliding
sunroof
The tilt/sliding sunroof must be synchro-
nized
after the battery has been
disconnected or discharged
after the tilt/sliding sunroof has been
closed manually (
page 439)
after a malfunction
if the tilt/sliding sunroof does not open
smoothly
Remove the respective fuse from the
main fuse box (
page 470).
Reinsert the fuse in the main fuse box.
Switch on the ignition (
page 37).
Move and hold the sunroof switch in di-
rection of arrow3 until the tilt/sliding
sunroof is fully raised at the rear.
Keep holding the sunroof switch in di-
rection of arrow3 for approximately
1 second.
Check the Express-open feature
(page 243).
If the tilt/sliding sunroof opens com-
pletely, the roof is synchronized. Other-
wise repeat the above steps.
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If the movement of the tilt/sliding sunroof is
blocked during the Express-close procedure, the
tilt/sliding sunroof will stop and reopen slightly.