Page 89 of 399

89 Controls in detail
Locking and unlocking
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 immediately to your
car insurance company.
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*
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.
If the SmartKey with KEYLESS-GO* is valid,
your vehicle unlocks
the doors
the trunk lid
the fuel filler flap
iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 96). The
turn signals will flash three times to
confirm locking.
If the vehicle was previously separately
locked (
page 98), the trunk lid will re-
main locked.
Page 90 of 399

90 Controls in detailLocking and unlocking
Important notes on using KEYLESS-GO
You can also use the SmartKey with
KEYLESS-GO like a normal key
(page 86).
You can combine KEYLESS-GO func-
tions with normal key functions (e.g.
unlocking with KEYLESS-GO and lock-
ing with the remote control).
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 key
must be located outside the vehicle
within approximately 3 ft. (1 m) of a
door or the trunk.
In order to start the engine with the
SmartKey with KEYLESS-GO:
The SmartKey with KEYLESS-GO
must be located in the vehicle.
All the doors must be closed.
If you have started the engine with the
KEYLESS-GO start/stop button, you
can only turn it off again with this but-
ton, even if you have put the key in the
starter switch in the meantime.
This does not apply if, after starting, the
selector lever is still in positionP. The
SmartKey will then have priority over
the KEYLESS-GO function and the vehi-
cle’s electrical system will operate ac-
cording to the position of the key in the
starter switch, even stopping the en-
gine.
If the SmartKey with KEYLESS-GO is
positioned farther away from the vehi-
cle (e.g. inside clothing or briefcase)
and can no longer be recognized by the
Warning!
G
When leaving the vehicle always remove the
key from the starter switch, take the Smart-
Key with KEYLESS-GO (if so equipped) with
you and lock the vehicle. Do not leave chil-
dren unattended in the vehicle, or with ac-
cess to an unlocked vehicle. Unsupervised
use of vehicle equipment may cause serious
personal injury.!To prevent possible malfunction, avoid
exposing the SmartKey with
KEYLESS-GO to high levels of electro-
magnetic radiation.
Page 91 of 399

91 Controls in detail
Locking and unlocking
system, the vehicle cannot be locked
or the engine started via the KEY-
LESS-GO system.
If the SmartKey with KEYLESS-GO is re-
moved from the vehicle while the igni-
tion is switched on (e.g. if passenger
exits the vehicle with the key), the mes-
sage
Key not recognized!
will appear
in the multifunction display.
Find the key or change its present loca-
tion immediately (e.g. place it on the
front passenger seat or insert it in shirt
pocket).
Remember that the engine can be
started by anyone with a SmartKey
with KEYLESS-GO that is left inside the
vehicle. If you leave the card behind
when exiting and locking the vehicle,
the message
Key recognized in vehi-
cle!
will appear in the multifunction
display.Factory setting
Global unlocking
Grasp the door handle.
The vehicle will lock again automatically
within approximately 40 seconds if neither
door nor trunk is opened.Global locking
Press lock button at door handle
(page 53) or trunk lid (
page 92).
iThe vehicle could be inadvertently un-
locked if the SmartKey with KEY-
LESS-GO is within 3 ft. (1 m) of the
vehicle and
the door handle is splashed with
water, or
you attempt to clean the door
handle.
!If you cannot lock or unlock the vehicle
with the SmartKey with KEYLESS-GO,
then either the batteries of the key are
discharged or the key is malfunction-
ing.
Check the batteries of the Smart-
Key with KEYLESS-GO (
page 88)
and replace them if necessary
(
page 328).
Use the mechanical key to unlock
the driver’s door (
page 327) and
trunk lid (
page 328) as required.
Lock the vehicle using the mechan-
ical key (
page 328).
If your SmartKey with KEYLESS-GO is
malfunctioning, contact your autho-
rized Mercedes-Benz Center.
Page 92 of 399

92 Controls in detailLocking and unlockingUnlocking the trunk lid
The handle is located in the rear license
plate recess.
Pull on the handle and lift up the trunk
lid.
The vehicle unlocks the trunk lid only.
If the vehicle was previously separately
locked or locked with the SmartKey, the
trunk lid will remain locked.The trunk can also be opened from the in-
side in an emergency, see "Trunk lid emer-
gency release" (
page 97).Locking the vehicle
1Lock button at trunk
Press the lock button at door
(page 53) or trunk.
Closing the side windows and slid-
ing/pop-up roof*
Press and hold lock button at door
(page 53) or trunk until the side win-
dows and the sliding/pop-up roof are
closed.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
iIf the vehicle was previously centrally
locked with the SmartKey, the trunk lid
will lock automatically after closing it.
The turn signals will flash three times to
confirm locking.
If you have left the SmartKey with KEY-
LESS-GO in the trunk, the trunk lid will
not close.
Page 93 of 399

93 Controls in detail
Locking and unlocking
Loss of the SmartKey with KEYLESS-GO
If you lose your SmartKey with KEY-
LESS-GO, you should do the following:
Have the SmartKey with KEYLESS-GO
deactivated by an authorized Mer-
cedes-Benz Center.
Report the loss 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
Pull on door handle2.
If door was locked, locking knob1 will
move up.
Warning!
G
When closing the windows and the slid-
ing/pop-up roof, be sure that there is no
danger of anyone being harmed by the clos-
ing procedure.
If potential danger exists, proceed as fol-
lows:
Release the lock button.
Pull on the door handle or trunk lid han-
dle and hold firmly. The side windows
and the sliding/pop-up roof will open.
Page 94 of 399

94 Controls in detailLocking and unlocking
Opening the trunk from the inside
You can open the trunk from the inside if
the vehicle is stationary.
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.
The switch is located on the driver’s door.
1Remote trunk lid release switch with in-
dicator lamp
Pull remote trunk lid release switch1.
The trunk opens. The indicator lamp in
the switch lights up and remains lit as
long as the trunk is open.The trunk can also be opened using the
SmartKey (
page 88) or from its inside in
an emergency, see "Trunk lid emergency
release" (
page 97).
iIf the vehicle has previously been
locked from the outside, opening a
door from the inside will trigger the an-
ti-theft alarm system. To cancel the
alarm, do one of the following:
Press button Œor ‹on the
SmartKey.
Insert the SmartKey in the starter
switch.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 96). The
turn signals will flash three times to
confirm locking.
If the vehicle was previously separately
locked (
page 98), the trunk lid will re-
main locked.
Page 95 of 399

95 Controls in detail
Locking and unlocking
Trunk lid opening/closing system*
The switch for opening and closing the
trunk is located on the driver’s door.
1Remote control switch
Pull remote control switch1 until the
trunk begins to open.
The trunk lid opens automatically.
The indicator lamp in the switch lights
up and remains lit until the trunk is
closed again by pressing remote con-
trol switch1.If the vehicle was previously separately
locked (
page 98), the trunk lid will re-
main locked.Activating opening height restriction of
trunk lid
If the opening height restriction of trunk lid
is activated, the trunk lid opens to below
the roof line of the vehicle.
1Trunk lid closing switch
Press the trunk lid closing switch 1 for
approx. 5 seconds.
The opening height restriction is acti-
vated.
Press the trunk lid closing switch 1
again for approx. 5 seconds.
The opening height restriction is deac-
tivated.
iThe trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
To stop the opening procedure, pull or
press the remote control switch for the
trunk lid.
Page 96 of 399

96 Controls in detailLocking and unlockingOpening the trunk
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.
The handle is located above the rear li-
cense plate recess.
Pull on the handle and lift up the trunk
lid.
The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
Closing the trunk
1Handle
Lower trunk lid using handle1.Vehicles with trunk lid opening/closing
system*
Closing from the inside
Press the remote control switch until
the indicator lamp in the switch goes
out and the trunk lid is closed.
When closing, if the trunk lid comes into
contact with an object (e.g. luggage that
has been piled too high) in the upper mo-
tion sequence, the closing procedure is
stopped and the trunk re-opens slightly.
iThe vehicle must be unlocked.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the trunk
opening when closing the trunk. Be espe-
cially careful when small children are
around.
Warning!
G
Monitor the closing procedure carefully to
ensure that no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the trunk opening when closing the trunk.
Be especially careful when small children
are around. To stop the closing procedure,
let go of the remote control switch for the
trunk.