
1 Contents
IntroductionProduct information .......................... 7
Operator’s manual ............................. 8
Where to find it ................................ 13
Reporting Safety Defects ................ 15Instruments and controlsInstruments and controls ............... 18
Door control panel ....................... 20
Overhead control panel ............... 21
Dashboard ..................................... 22
Center console .............................. 24OperationVehicle keys ...................................... 28
Start lock-out .................................... 32
General notes on the
central locking system ............... 33Central locking system ................... 34
Radio frequency and
infrared remote control .............. 34
KEYLESS-GO ................................ 38
Opening and closing
windows and
sliding/pop-up roof
from outside ................................. 45
Panic button ................................. 47
Mechanical keys .......................... 47
Doors ................................................. 48
Power closing assist for
doors and trunk lid .................... 50
Central locking switch .................... 50
Automatic central locking .............. 52
Emergency unlocking
in case of accident ...................... 52
Trunk ................................................. 53
Trunk lid release switch ................ 57
Trunk lid release/close switch ...... 58
Trunk lid emergency release .........61
Antitheft alarm system ................... 62
Tow-away alarm ............................... 64
Easy-entry/exit feature .................. 66Front seat adjustment ..................... 67
Removal and installation
of front seat head restraints ...... 71
Backrest ............................................. 72
Lumbar support ............................... 74
Multicontour backrest ..................... 74
Seat heater ........................................ 76
Seat ventilation system ................... 79
Power head restraints, rear ............ 81
Seat belts and
integrated restraint system ....... 82
Seat belts ........................................... 82
Seat belt nonusage
warning system ............................ 83
BabySmart
TM airbag
deactivation system .................... 88
Self-test BabySmart
TM
without special child
seat installed ................................. 89
Supplemental restraint
system (SRS) ................................ 90
Emergency tensioning
retractor (ETR) ............................. 91
Airbags .............................................. 92

24 Instruments and controls
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Center console1ESP (electronic stability program) control switch,
seepage273
2Level control, see page 276
3ABC (active body control), see page 275
4Rear seat head restraints, automatic, see page 81
5Hazard warning flasher switch, see page 163
6Central locking switch, see page 50
7Antitheft alarm system, see page 62
Switch for tow-away alarm, see page 64
8Parking assist (parktronic system) deactivation,
seepage279
9Rear window sunshade, see page 186
10COMAND system, see separate operating
instructions
11Automatic climate control, see page 164
Rear window defroster, see page 176

26 Contents - Operation
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
OperationVehicle keys ...................................... 28
Start lock-out .................................... 32
General notes on the
central locking system ............... 33
Central locking system ................... 34
Radio frequency and infrared
remote control .............................. 34
KEYLESS-GO ................................. 38
Opening and closing
windows and
sliding/pop-up roof
from outside .................................. 45
Panic button .................................. 47
Mechanical keys ........................... 47
Doors .................................................. 48
Power closing assist for
doors and trunk lid ..................... 50
Central locking switch .................... 50
Automatic central locking .............. 52
Emergency unlocking
in case of accident ...................... 52
Trunk ................................................. 53
Trunk lid release switch ................. 57Trunk lid release/close switch ...... 58
Trunk lid emergency release .........61
Antitheft alarm system ................... 62
Tow-away alarm ............................... 64
Easy-entry/exit feature .................. 66
Front seat adjustment ..................... 67
Removal and installation
of front seat head restraints ......71
Backrest ............................................ 72
Lumbar support ................................74
Multicontour backrest .....................74
Seat heater ......................................... 76
Seat ventilation system .................. 79
Power head restraints, rear ............81
Seat belts and
integrated restraint system ....... 82
Seat belts .......................................... 82
Seat belt nonusage
warning system ............................ 83
BabySmart
TM airbag
deactivation system ................... 88
Self-test BabySmart
TM
without special child
seat installed ................................ 89Supplemental restraint
system (SRS) ................................ 90
Emergency tensioning
retractor (ETR) ............................. 91
Airbags .............................................. 92
Safety guidelines for the
seat belt, emergency
tensioning retractor
and airbag .................................. 100
Infant and child
restraint systems ....................... 102
Steering wheel adjustment .......... 105
Rear view mirrors .......................... 106
Rear view mirror,
automatic antiglare .................. 106
Memory function ............................ 111
Instrument cluster ..........................114
Multifunction steering wheel,
multifunction display ............... 120
Trip and main odometer,
FSS, tire inf lation pressure
monitor and
engine oil level indicator ......... 124
Audio systems ................................ 125
Radio ............................................ 125

28 Central locking system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Vehicle keys and KEYLESS-GO-cards (optional)
Included with your vehicle are:
•2 electronic main keys with integrated radio
frequency and infrared remote controls plus
removable mechanical key.
The locking tabs for the mechanical key portion of
the two electronic main keys are a different color to
help distinguish each individual key.
•1 electronic reserve key without remote control
functions, plus removable mechanical key.
•Ve h i c l e s w i t h K E Y L E S S - G O :
2 K EY L ES S -G O - c a r d s w it h o u t r e m ov a b l e m e ch a n ic a l
key.Ve h i c l e s w i t h K E Y L E S S - G O :
See page 44 on how to use the electronic key together
with the KEYLESS-GO-card.
Important!
In the case of the loss of a KEYLESS-GO-card, electronic
keys or mechanical keys, please, contact an authorized
Mercedes-Benz Center or call 1-800-FOR-MERCedes (in
the USA), or 1-800-387-0100 (in Canada) as soon as
possible to have the keys or KEYLESS-GO-card
deactivated.
Wa r n i n g !
When leaving the vehicle always remove the
electronic key from the starter switch and take the
KEYLESS-GO-card (if so equipped) with you, and
lock your vehicle. Do not leave children unattended
in the vehicle, or with access to an unlocked
vehicle. Unsupervised use of vehicle equipment
may cause serious personal injury.

29 Central locking system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Electronic main key
The electronic main key has an integrated radio
frequency and infrared remote control, plus removable
mechanical key.
The remote control (1) operates all locks on the vehicle.
The mechanical key (2) works only in the driver’s door,
trunk, and storage compartment locks.When using the mechanical key (2) for lock operations,
it can be removed by sliding it out of the remote control.
To do so, move locking tab (3) to the right and slide the
mechanical key (2) in direction of arrow (4).
The remote control transmitter is located in the
electronic main key.
The infrared receivers are located in the door handles.
Note:
Remove the mechanical key from the electronic main
key w hen u sing vale t pa rk ing service. To prevent ac cess
to trunk or storage compartments lock them separately
and retain the mechanical key.
See page 53 for separate locking of trunk and page 189
for locking of glove box.
P80.35-2031-26
1
3
4
2

30 Central locking system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Electronic reserve key
The electronic reserve key is without remote control
functions, plus removable mechanical key.The electronic reserve key (1) works only in the starter
switch. There are no batteries inside the electronic
reserve key.
The mechanical key (2) works only in the driver’s door,
trunk, and storage compartment locks.
To use the mechanical key (2), remove it from its
electronic reserve key (1).
Note:
We recommend that you carry the electronic reserve
key plus mechanical key with you and keep it in a safe
place (e.g. your wallet) so that it is always handy. Never
leave the electronic reserve key in the vehicle.
P80.35-2036-26
1

31 Central locking system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index KEYLESS-GO-card
The KEYLESS-GO-card (1) does not have a removable
mechanical key.
The functions of the KEYLESS-GO-card (1) are identical
to those of the electronic main key. Carrying the card
with you permits the use of the vehicle.The validity of the KEYLESS-GO-card is checked every
time when grasping a door handle or pushing the trunk
lid release. Once the KEYLESS-GO-card is recognized
outside the vehicle, the doors, trunk lid and fuel filler
flap are unlocked, depending on the selected mode
(global or selective unlocking mode, see page 43).
Starter switch KEYLESS-GO, see page 224.
Starting and turning off the engine with KEYLESS-GO,
see page 227 and page 228.
Note:
In th e case of a mal function in th e KEYLESS-G O -system ,
we recommend that you carry the electronic key plus
mechanical key with you and keep them in a safe place
so tha t t hey are always ha nd y. Never leave th e el ectronic
key or a KEYLESS-GO-card in the vehicle.
Obtaining replacement keys
Your vehicle is equipped with a theft deterrent locking
system requiring a special key manufacturing process.
For security reasons, replacement keys or the KEYLESS-
GO-card can only be obtained from your authorized
Mercedes-Benz Center.
P80.30-2029-26
1

32 Central locking system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Start lock-out
Important!
Operating with electronic key:
Removing the electronic key from the starter switch
activates the start lock-out. The engine cannot be
started.
Inserting the electronic key in the starter switch
deactivates the start lock-out.
Operating with KEYLESS-GO:
Turning off the engine with the start-/stop button on the
gear selector lever activates the start lock-out. For
turning off the engine with KEYLESS-GO, see page 228.
Starting the engine with the start-/stop button
deactivates the start lock-out, if a valid KEYLESS-GO-
card is recognized inside the vehicle. For starting the
engine with KEYLESS-GO, see page 227. The engine
cannot be started with a KEYLESS-GO-card outside the
vehicle.Note:
In case the engine cannot be started (vehicle’s battery is
in order), 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).