Page 28 of 506
26 At a glanceMultifunction steering wheel
Item
Page
1
Multifunction display in 
speedometer
145
Operating control sys-
tem
146
2
Selecting the submenu or 
setting the volume:
Press buttonæup/to increaseçdown/to decrease
3
Telephone*:
Press buttonsto take a call
to dial a calltto end a call
to reject an incom-
ing call
Item
Page
4
Menu systems:
Press buttonèfor next menuÿfor previous menu
5
Moving within a menu: 
Press buttonjfor next displaykfor previous display 
     
        
        Page 35 of 506

33 Getting started
Unlocking
Get in the vehicle and insert the 
SmartKey in the starter switch.
For more information, see “Locking and 
unlocking” (
page 98). 
Unlocking with KEYLESS-GO*
With KEYLESS-GO you can open and start 
your vehicle without using the buttons on 
the SmartKey.
Pull the outside door handle.
All turn signal lamps flash once. The ve-
hicle unlocks. The locking knobs on the 
doors move up. The anti-theft alarm 
system is disarmed.
Get in the vehicle.
For more information, see “SmartKey with 
KEYLESS-GO*” (
page 102).
Starter switch positions
iTo unlock the vehicle, the SmartKey 
with KEYLESS-GO must be outside the 
vehicle, no further than approximately 
3 feet (1 meter) away from the door. 
Warning!
G
When leaving the vehicle, always take the 
SmartKey with KEYLESS-GO 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.iThe SBC brake system is activated 
(page 90).
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, or 
with access to an unlocked vehicle. Unsu-
pervised use of vehicle equipment may 
cause an accident and/or serious personal 
injury. 
     
        
        Page 43 of 506
41 Getting started
Adjusting
Interior rear view mirror
Manually adjust the interior rear view 
mirror.
For more information, see “Rear view mir-
rors” (
page 186). 
Exterior rear view mirrorsThe buttons are located on the driver’s 
door.
1Passenger-side exterior rear view mir-
ror button
2Adjustment button
3Driver’s side exterior rear view mirror 
button
Switch on the ignition (
page 33).
Press button3 for the driver’s side ex-
terior rear view mirror or button1 for 
the passenger-side exterior rear view 
mirror.
Push adjustment button2 up, down, 
left or right according to the desired 
setting.
Warning!
G
Exercise care when using the passen-
ger-side exterior rear view mirror. The mirror 
surface is convex (outwardly curved surface 
for a wider field of view). Objects in mirror 
are closer than they appear. Check your in-
terior rear view mirror or glance over your 
shoulder before changing lanes. 
     
        
        Page 102 of 506

100 Controls in detailLocking and unlockingThe vehicle will lock again automatically 
and reactivate the anti-theft alarm system 
within approximately 40 seconds of un-
locking if:
neither door nor trunk is opened
the SmartKey is not inserted in the 
starter switch
the central locking switch is not acti-
vated
Global locking
Press button‹.
All turn signal lamps flash three times. 
The locking knobs in the doors move 
down. The anti-theft alarm system is 
armed.
Selective setting
If you frequently travel alone, you may wish 
to reprogram the SmartKey so that 
pressingŒ only unlocks the driver’s 
door and the fuel filler flap.
Press and hold buttonsŒ and‹ 
simultaneously for about five seconds 
until battery check lamp5 flashes 
twice.
The SmartKey will then function as fol-
lows:
Unlocking driver’s door and fuel filler 
flap
Press buttonŒ once.
All turn signal lamps flash once. The 
locking knob in the driver's door moves 
up. The anti-theft alarm system is dis-
armed.
Global unlocking
Press buttonŒ twice.
All turn signal lamps flash once. The 
locking knobs in the doors move up. 
The anti-theft alarm system is dis-
armed.Global locking
Press button‹.
All turn signal lamps flash three times. 
The locking knobs in the doors move 
down. The anti-theft alarm system is 
armed.
Restoring to factory setting
Press and hold buttonsŒ and‹ 
simultaneously for about six seconds 
until battery check lamp5 flashes 
twice. 
     
        
        Page 103 of 506

101 Controls in detail
Locking 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 trunk lid
You can unlock and open the trunk sepa-
rately.
A minimum height clearance of 5.90 ft 
(1.80 m) is required to open the trunk lid.
Press and hold buttonŠ until 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 117).
!If you can no longer lock or unlock the 
vehicle with the SmartKey, then either 
the batteries in the SmartKey are dis-
charged, the SmartKey is malfunction-
ing or the vehicle battery is drained.
Check the batteries in the 
SmartKey (
page 101) and re-
place them if necessary 
(
page 415).
Use the mechanical key to unlock 
the driver’s door (
page 410).
Have the vehicle batteries and their 
connections checked.
Use the mechanical key to lock the 
driver’s door (
page 410).
If the SmartKey is malfunctioning, con-
tact 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 415).
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.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is 
sufficient overhead clearance.
Vehicles with trunk lid opening/closing 
system*: to stop the opening proce-
dure, press buttonŠ on the 
SmartKey. The trunk lid stops moving. 
     
        
        Page 108 of 506

106 Controls in detailLocking and unlockingSelective setting
If you frequently travel alone, you may wish 
to reprogram the SmartKey with 
KEYLESS-GO so when you grasp the driv-
er’s door handle only the driver’s door and 
the fuel filler flap unlocks.
Press and hold buttonsŒ and‹ 
simultaneously for about five seconds 
until battery check lamp5 flashes 
twice.
The SmartKey with KEYLESS-GO will 
then function as follows:
Unlocking driver’s door and fuel filler 
flap
Press buttonŒ once.
All turn signal lamps flash once. The 
locking knob in the driver's door moves 
up. The anti-theft alarm system is dis-
armed.Global unlocking
Press buttonŒ twice.
All turn signal lamps flash once. The 
locking knobs in the doors move up. 
The anti-theft alarm system is dis-
armed.
Global locking
Press button‹.
All turn signal lamps flash three times. 
The locking knobs in the doors move 
down. The anti-theft alarm system is 
armed.
Restoring to factory setting
Press and hold buttonsŒ and‹ 
simultaneously for about six seconds 
until battery check lamp5 flashes 
twice.
!If you can no longer lock or unlock the 
vehicle with the SmartKey with 
KEYLESS-GO, then the batteries in the 
SmartKey are discharged, the 
SmartKey with KEYLESS-GO is mal-
functioning or the vehicle battery is 
drained.
Check the batteries in the 
SmartKey with KEYLESS-GO 
(page 107) and replace them if 
necessary (
page 415).
Use the mechanical key to unlock 
the driver’s door (
page 410).
Have the vehicle battery checked 
by an authorized Mercedes-Benz 
Center.
Use the mechanical key to lock the 
driver’s door (
page 410).
If the SmartKey with KEYLESS-GO is 
malfunctioning, contact an authorized 
Mercedes-Benz Center. 
     
        
        Page 110 of 506

108 Controls in detailLocking and unlockingUnlocking and opening the trunk lid
You can unlock and open the trunk lid sep-
arately.
A minimum height clearance of 5.90 ft 
(1.80 m) is required to open the trunk lid.
The handle is located in the rear license 
plate recess.
Pull on the handle
or
Press and hold buttonŠ until the 
trunk lid unlocks and opens.Loss of the 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 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. 
!The trunk lid swings open upwards au-
tomatically. Always make sure there is 
sufficient overhead clearance.
Vehicles with trunk lid opening/closing 
system*: to stop the opening proce-
dure, press buttonŠ on the 
SmartKey with KEYLESS-GO. The trunk 
lid stops moving.iIf the vehicle was previously centrally 
locked with KEYLESS-GO, the trunk will 
lock automatically after closing it. The 
turn signals flash three times to con-
firm locking. 
     
        
        Page 112 of 506

110 Controls in detailLocking and unlockingOpening the trunk
Opening the trunk from the outside
A minimum height clearance of 5.90 ft 
(1.80 m) is required to open the trunk lid.
The handle is located above the rear li-
cense plate recess.
In vehicles without KEYLESS-GO*: The ve-
hicle must be unlocked.
Pull on the handle.
The trunk lid opens.Opening the trunk from the inside
You can open the trunk from the inside if 
the vehicle is stationary. 
A minimum height clearance of 5.90 ft 
(1.80 m) is required to open the trunk lid.
The switch is located on the driver’s door.
1Remote trunk lid switch with indicator 
lamp
!The trunk lid swings open upwards au-
tomatically. Always make sure there is 
sufficient overhead clearance.iThe trunk can also be opened using the 
buttonŠ on the SmartKey or 
SmartKey with KEYLESS-GO* or from 
its inside in an emergency, see “Trunk 
lid emergency release” (
page 117).
iIf the vehicle was previously centrally 
locked, the trunk will lock automatical-
ly after closing it. The turn signals flash 
three times to confirm locking.