Page 105 of 498

103 Controls in detail
Locking and unlocking
Checking the batteries
Press button‹ orŒ.
Battery check lamp5 comes on 
briefly to indicate that the SmartKey 
batteries are in order.Global locking using the lock button at 
trunk lid
1Lock button at trunk
Press lock button1 at the trunk lid.
Have the vehicle battery and the 
battery connections checked 
(page 420).
Use the mechanical key to lock the 
driver’s door (
page 398).
If the SmartKey with KEYLESS-GO is 
malfunctioning, contact an authorized 
Mercedes-Benz Center.
iIf battery check lamp5 does not 
come on briefly during check, then the 
SmartKey batteries are discharged.
Replace the batteries (
page 402). 
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‹ orŒ button will lock or 
unlock the vehicle accordingly.
iTo prevent a possible inadvertent 
lockout, the trunk lid will open 
automatically if a SmartKey with 
KEYLESS-GO* is recognized inside the 
vehicle or in the trunk.
 
     
        
        Page 106 of 498
104 Controls in detailLocking and unlocking
All turn signal lamps flash three times. 
The locking knobs in the doors move 
down. The anti-theft alarm system is 
armed.Unlocking and opening the trunk lid
A minimum height clearance of 5.71 ft 
(1.74 m) is required to open the trunk lid.
The handle is located in the rear license 
plate recess.
1Handle
Pull on handle1.
The trunk opens.
or
Press and hold button Š until the 
trunk unlocks and begins to open.The trunk can also be opened from its in-
side in an emergency, see “Trunk lid emer-
gency release” (
page 109).
iYou can also lock the vehicle using the 
lock button at outside door handle 
(page 58).
!The trunk lid swings open upwards au-
tomatically. Always make sure there is 
sufficient overhead clearance.iIf the vehicle was previously centrally 
locked, the trunk lid will lock automati-
cally when closed (
page 107). The 
turn signals will flash three times to 
confirm locking.
 
     
        
        Page 108 of 498
106 Controls in detailLocking and unlocking
Opening the trunk 
Opening the trunk from outside 
(vehicles without KEYLESS-GO*)
A minimum height clearance of 5.71 ft 
(1.74 m) is required to open the trunk lid.
The handle is located in the rear license 
plate recess.
1Handle
Pull on handle1.
The trunk lid unlocks and begins to 
open.
The trunk can also be opened using 
buttonŠ on the SmartKey or from its 
inside in an emergency, see “Trunk lid 
emergency release” (
page 109).
iIf you open a door, the side windows on 
that side of the vehicle will lower slight-
ly. The windows close again when you 
close the door.
iThe vehicle must be unlocked.!The trunk lid swings open upwards au-
tomatically. Always make sure there is 
sufficient overhead clearance. 
     
        
        Page 109 of 498

107 Controls in detail
Locking 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 5.71 ft 
(1.74 m) is required to open the trunk lid.
The remote trunk lid switch is located on 
the driver’s door.
1Remote trunk lid switch with indicator 
lamp
Press remote trunk lid switch1 until 
the trunk begins to open.
The indicator lamp in the switch 
remains lit as long as the trunk is open.
The trunk can also be opened using 
buttonŠ on the SmartKey or from its 
inside in an emergency, see “Trunk lid 
emergency release” (
page 109).
Closing the trunk
Depending on production date, your 
vehicle is equipped with either trunk 
design A or B.Trunk design A1Handle
Lower trunk lid by pulling firmly on 
handle1.
Close trunk lid with hands placed flat 
on the trunk lid.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is 
sufficient overhead clearance.iIf the vehicle was previously centrally 
locked, the trunk lid will lock automati-
cally when closed (
page 107). The 
turn signals will flash three times to 
confirm locking. 
     
        
        Page 110 of 498

108 Controls in detailLocking and unlockingTrunk design B1Handle
2Handles
Lower trunk lid by pulling firmly on 
handle1 or handles2.
Close trunk lid with hands placed flat 
on the trunk lid.
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.
When leaving the vehicle, always remove the 
SmartKey or SmartKey with KEYLESS-GO* 
from the starter switch, take it with you, and 
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an 
unlocked vehicle. It is possible for children 
to open a locked door from the inside, which 
could result in an accident and/or serious 
personal injury.Warning!
G
Only drive with the trunk closed. Among oth-
er dangers, such as your view being blocked, 
exhaust fumes may enter the vehicle 
interior.
iDo not place the SmartKey in the open 
trunk. You may lock yourself out.iVehicles with KEYLESS-GO*:
To prevent a possible inadvertent lock-
out, the trunk lid will open automatical-
ly if a SmartKey with KEYLESS-GO* is 
recognized inside the vehicle or in the 
trunk. 
     
        
        Page 111 of 498

109 Controls in detail
Locking and unlocking
Trunk lid emergency release
The emergency release button is located 
on the inside of the trunk lid.
1Emergency release button
Briefly press emergency release 
button1.
The trunk lid unlocks and the trunk lid 
opens.Illumination of the emergency release but-
ton:
The button will flash for 30 minutes 
after opening the trunk.
The button will flash for 60 minutes 
after closing the trunk.
!The trunk lid swings open upwards au-
tomatically.
iThe emergency release button unlocks 
and opens the trunk while the vehicle is 
standing still or in motion.iThe emergency release button does 
not open the trunk lid if the vehicle 
battery is discharged or disconnected.
iIf the emergency release button is 
pressed and the vehicle was centrally 
locked, the exterior lamps will flash and 
the alarm will sound as the trunk lid 
opens. To cancel the alarm, do one of 
the following:
press buttonŒ or‹ on the 
SmartKey.
insert the SmartKey in the starter 
switch.
In vehicles with KEYLESS-GO*:
pull the outside door handle.
press the start/stop button. 
     
        
        Page 112 of 498

110 Controls in detailLocking and unlockingAutomatic central locking
The doors and the trunk automatically lock 
when the ignition is switched on and the 
wheels are turning at vehicle speeds of 
approximately 9 mph (15 km/h) or more.
You can open a locked door from the 
inside. Open doors only when conditions 
are safe to do so.
You can deactivate the automatic locking 
mode using the control system, see “Set-
ting automatic locking” (
page 158).
Locking and unlocking from the inside
You can lock or unlock the doors and the 
trunk from inside using the central locking 
or unlocking switch. This can be useful, for 
example, if you want to lock the vehicle 
before starting to drive.
You cannot lock or unlock the fuel filler flap 
with the central locking or unlocking 
switch.The switch is located in the center console.
1Central locking switch
2Central unlocking switch
iThe doors unlock automatically after an 
accident if the force of the impact 
exceeds a preset threshold.
To prevent the vehicle door locks from 
locking, deactivate the automatic 
central locking when the vehicle
is pushed or towed
is on a test stand
Warning!
G
When leaving the vehicle, always remove the 
SmartKey or SmartKey with KEYLESS-GO* 
from the starter switch, take it with you, and 
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an 
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause an accident 
and/or serious personal injury. 
     
        
        Page 135 of 498

133 Controls in detail
Lighting
Manual control
Switching all front interior lights on and 
off
Press the W symbol on rocker 
switch3.
The front interior lights come on.
Press rocker switch3 to center 
position to activate the automatic 
control.
Switching rear interior lights on and off
Press button V.
The light in the rear passenger 
compartment come on.
Press button V again.
The light in the rear passenger 
compartment go out.Switching right front reading lamp on 
and off
Press right button X.
The right reading lamp comes on.
Press right button X again.
The right reading lamp goes out.
Switching left front reading lamp on and 
off
Press left button X.
The left reading lamp comes on.
Press left button X again.
The left reading lamp goes out.
Door entry lamps
The appropriate door entry lamp switches 
on if a door is opened in darkness and if 
the interior lighting is switched to automat-
ic function.
The entry lamp switches off automatically 
when the door is closed.Trunk lamp
The trunk lamp switches on if the trunk lid 
is opened.
If you leave the trunk open for an extended 
period of time, the trunk lamp will switch 
off automatically after approximately ten 
minutes.
iIf you turn the SmartKey in the starter 
switch to position0 and switch off the 
exterior headlamps, the door entry 
lamps will remain lit for approximately 
five minutes.