Page 110 of 491

109 Controls in detail
Locking and unlocking
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
tailgate.
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.
The brake pedal must be firmly de-
pressed. Do not depress the accel-
erator.
If you have started the engine with the
KEYLESS-GO start / stop button
(page 36), you can only turn it off
again with this button, even if you have
put the SmartKey in the starter switch
in the meantime.
This does not apply if, after starting, the
selector lever is still in positionP and
then the SmartKey is inserted in the
starter switch. The SmartKey will then
have priority over the KEYLESS-GO
function and the vehicle’s electrical
system will operate according to the
position of the SmartKey in the starter
switch, even stopping the engine.
If the SmartKey with KEYLESS-GO is
positioned farther away from the vehi-
cle and can no longer be recognized by
the system, 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 while the igni-
tion is switched on (e.g. if passenger
exits the vehicle with the SmartKey),
the message
Key not recognized
will
appear in the multifunction display.
Find the SmartKey or change its
present location 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 SmartKey with
KEYLESS-GO behind when exiting and
locking the vehicle, the message
Key
still in vehicle
will appear in the
multifunction display.
Page 111 of 491

110 Controls in detailLocking and unlockingFactory settingGlobal unlocking
Pull the outside door handle.
All turn signal lamps flash once.
An acoustic signal sounds once (if
equipped and feature activated).
The locking knobs in the doors
move up.
The anti-theft alarm system is dis-
armed.
The vehicle will lock again automatically
within approximately 40 seconds if neither
door nor tailgate is opened.Global locking
Press lock button at outside door
handle (
page 60) or tailgate
(
page 113).
All turn signal lamps flash three
times.
An acoustic signal sounds three
times (if equipped and feature acti-
vated).
The locking knobs in the doors
move down.
The anti-theft alarm system is
armed.
iDepending on production date, your
vehicle may be equipped with an
acoustic lock and unlock confirmation
signal feature. If your vehicle is
equipped with this feature and the fea-
ture is activated, an acoustic signal will
sound when the vehicle is locked or un-
locked using the SmartKey with
KEYLESS-GO.
To determine whether or not your vehi-
cle is equipped with this feature,
contact an authorized Mercedes-Benz
Center. If equipped and you wish to ac-
tivate or deactivate the feature, or ad-
just its signal volume, also contact an
authorized Mercedes-Benz Center.
Page 113 of 491

112 Controls in detailLocking and unlocking
Checking the batteries
Press button‹ orŒ.
Battery check lamp5 comes on brief-
ly to indicate that the SmartKey batter-
ies are in order.Unlocking and opening the tailgate
A minimum height clearance of 6.76 ft
(2.06 m) is required to open the tailgate.
The handle is located in the rear license
plate recess.
You can unlock and open the tailgate sep-
arately.
Pull on the handle.
or
Press and hold buttonŠ until the
tailgate unlocks and opens.
!If you can no longer lock or unlock the
vehicle with the SmartKey with
KEYLESS-GO, then the batteries of the
SmartKey are discharged, or the
SmartKey is malfunctioning or the vehi-
cle battery is drained.
Check the batteries of the
SmartKey with KEYLESS-GO
(page 112) and replace them if
necessary (
page 408).
Use the mechanical key to unlock
the driver’s door (
page 404) as
required.
Have the vehicle batteries and their
connections checked.
Use the mechanical key to lock the
doors (
page 405).
If the SmartKey with KEYLESS-GO is
malfunctioning, contact an authorized
Mercedes-Benz Center.
!If battery check lamp5 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 408).
You can obtain the required batteries
at any authorized Mercedes-Benz
Center.
iIf the batteries are checked within sig-
nal range of the vehicle, pressing the
button‹ orŒ will lock or unlock
the vehicle accordingly.
Page 114 of 491

113 Controls in detail
Locking and unlocking
Global locking using the lock button at
tailgate
1Lock button at tailgate
Press the lock button1.
All turn signal lamps flash three times.
An acoustic signal sounds once (if
equipped and feature activated).
For more information, see “Factory set-
ting” (
page 110).
The locking knobs in the doors move
down.
The anti-theft alarm system is armed.
!The tailgate swings open upwards auto-
matically. Always make sure there is
sufficient overhead clearance.
Vehicles with tailgate opening/closing
system*: to stop the opening proce-
dure, press buttonŠ on the
SmartKey. The tailgate stops moving.iIf the vehicle was previously centrally
locked, the tailgate will lock automati-
cally when closed (
page 117).
To confirm locking all turn signal lamps
flash three times.
iTo prevent a possible inadvertent lock-
out, the tailgate will open automatically
if a SmartKey with KEYLESS-GO is
recognized in the rear shelf or inside
the vehicle.iIf the vehicle was previously centrally
locked with KEYLESS-GO, the trunk will
lock automatically after closing it.
To confirm locking all turn signal lamps
flash three times.iYou can also lock the vehicle using the
lock button at outside door handle
(page 60) or KEYLESS-GO locking/
closing switch (
page 121).
Page 116 of 491

115 Controls in detail
Locking and unlocking
Front doors
Pull on door handle2 on the respec-
tive front door to open door.
If door was locked, locking knob1 will
move up.
Rear doors
Pull up locking knob1 on the respec-
tive rear door to unlock door.
Pull on door handle2 on the respec-
tive rear door to open door.
Opening the tailgate
Opening the tailgate from the outside
A minimum height clearance of 6.76 ft
(2.06 m) is required to open the tailgate.
The handle is located above the rear
license plate recess.
Pull on the handle.
The tailgate opens.
!The tailgate swings open upwards auto-
matically. Always make sure there is
sufficient overhead clearance.
Vehicles with tailgate opening/closing
system*: to stop the opening proce-
dure, press buttonŠ on the
SmartKey. The tailgate stops moving.iThe tailgate can also be opened using
the Š button on the SmartKey or
SmartKey with KEYLESS-GO.iIf the vehicle was previously centrally
locked, the tailgate will lock automati-
cally when closed (
page 117).
To confirm locking all turn signal lamps
flash three times.
Page 117 of 491

116 Controls in detailLocking and unlockingOpening the tailgate from the inside
with handle
You can open the tailgate from the inside if
the vehicle is stationary.
A minimum height clearance of 6.76 ft
(2.06 m) is required to open the tailgate.
The handle is located on the inside of the
tailgate.
1Handle
2Catch
To unlock the tailgate, move the
catch2 to the right.
Pull handle1 down and swing tailgate
upward.Opening the tailgate from the inside au-
tomatically*
In vehicles with tailgate opening/closing
system* you can open the tailgate from
the inside if the vehicle is stationary.
A minimum height clearance of 6.76 ft
(2.06 m) is required to open the tailgate.
The switch is located on the driver’s door.
1Remote tailgate release switch with in-
dicator lamp
!Always make sure there is sufficient
overhead clearance.iTo lock the tailgate, move the catch2
to the left.Warning!
G
When leaving the vehicle, always remove the
SmartKey or the SmartKey with
KEYLESS-GO* from the starter switch, take
it with you, and lock the vehicle. Do not
leave children unattended in the vehicle.
Children could open the tailgate from the in-
side, which could result in an accident
and/or serious personal injury.
Page 118 of 491

117 Controls in detail
Locking and unlocking
Pull and hold remote tailgate release
switch1 until
the tailgate is completely open
(opened to its full extent)
or
the tailgate has reached the desired
opening angle.
The tailgate stops moving as soon as
you release the switch. The indicator
lamp in the switch comes on. It re-
mains lit until the tailgate is closed
again.Limiting opening height of tailgate*
Vehicles with tailgate opening/closing
system*:
The tailgate opening height can be limited
when transporting goods on a roof rack
(e.g. presence of an optional MB sport lug-
gage container). When activated, the tail-
gate opens to approximately the height of
the roof edge.
Activate the limiting opening height of
tailgate using the control system
(page 174).
Closing the tailgate
1Handle
Lower tailgate using handle1.
Close tailgate with hands placed flat on
it.
!The tailgate swings open upwards as
long as you pull and hold the remote
tailgate release switch. Always make
sure there is sufficient overhead clear-
ance. To stop the opening procedure,
release the remote tailgate release
switch.
iThe tailgate can also be opened using
theŠ button n the SmartKey or
SmartKey with KEYLESS-GO*.
Page 119 of 491

118 Controls in detailLocking and unlocking1Strap in vehicles with folding bench
seat
Pull the tailgate down from the inside of
the vehicle using strap1.
Closing the tailgate from the outside
(vehicles without KEYLESS-GO*)
In vehicles with tailgate opening/closing
system* you can close the tailgate sepa-
rately from the outside using the tailgate
closing switch.1Tailgate closing switch
Press tailgate closing switch 1 briefly.
The tailgate closes.
If the tailgate comes into contact with an
object while closing (e.g. luggage that has
been piled too high), the closing procedure
is stopped and the tailgate reopens
slightly.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the cargo
compartment opening when closing the tail-
gate. Be especially careful when small chil-
dren are around.
Warning!
G
Only drive with the tailgate closed as,
among other dangers such as visibility
blockage, exhaust fumes may enter the ve-
hicle interior.iTo prevent an inadvertent lockout, do
not place the SmartKey in the cargo
compartment.
Vehicles with KEYLESS-GO*:
To prevent a possible inadvertent lock-
out, the tailgate will open automatically
if a SmartKey with KEYLESS-GO is rec-
ognized inside the vehicle or in the car-
go compartment.
iYou can also close the tailgate by hand.