
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 

5 ContentsChanging wheels  ...........................340
Tire inflation pressure  ..................345
Battery .............................................346
Jump starting  ..................................349
Towing the vehicle ......................... 351
Exterior lamps  ................................354
Headlamp assembly ...................355
Taillamp assemblies  ..................358
Standby bulb function ................... 361
Changing batteries 
in the electronic main key .......363
Synchronizing
remote control  ............................365
Changing batteries
in the KEYLESS-GO-card  .........366
Emergency engine
shut-down ...................................368
Fuel filler flap, 
manual release  ..........................368Emergency operation of
sliding/pop-up roof  .................. 369
Replacing wiper blades  ................ 370
Trunk lamp ......................................371
Roof rack  ......................................... 372
Vehicle careCleaning and care
of the vehicle  ..............................374
Power washer  ............................. 375
Tar stains  .....................................376
Paintwork, painted body 
components .................................376
Engine cleaning  ..........................376
Vehicle washing  ..........................376
Ornamental moldings  ............... 377
Headlamps, taillamps, 
turn signal lenses  ...................... 377Cleaning the Distronic 
system sensor  .............................378
Cleaning the parktronic 
system sensors  ...........................378
Wiper blades  ...............................379
Light alloy wheels  ......................380
Instrument cluster  ..................... 381
Steering wheel and 
gear selector lever ...................... 381
Cup holder ................................... 381
Seat belts  .....................................382
Headliner and shelf
below rear window .....................382
Leather upholstery .....................382
Hard plastic trim items  .............382
Plastic and rubber parts ............382 

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 KEYLESS-GO-cards without removable mechanical 
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. 

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 

33 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index General notes on the central locking system
If the electronic key is inserted in the starter switch, the 
vehicle cannot be locked or unlocked with the remote 
control.
If the vehicle cannot be locked or unlocked:
•Aim transmitter eye at a receiver on either door 
handle. Check the batteries of the electronic main 
key, see page 363, or synchronize the remote 
control, see page 365. 
•Vehicles with KEYLESS-GO only:
A KEYLESS-GO-card must be recognized by the 
system as being outside the vehicle to enable the 
vehicle to be locked or unlocked (maximum distance 
between card and doors or trunk is approx. 3 ft. (1 
m). Check the location of the KEYLESS-GO-card, see 
page 38. Check the batteries of the KEYLESS-GO-
card, see page 366. The trunk lid will open 
automatically if a KEYLESS-GO card is detected in 
the trunk, see page 38.Note:
If neither the remote control nor KEYLESS-GO system 
functions, use the mechanical key to unlock or lock the 
vehicle. To start engine, insert the electronic key in the 
starter switch. There could be a slight delay until the 
electronic key can be turned in the starter switch.
Important!
When unlocking the driver’s door with the mechanical 
key, the exterior lamps will flash and the alarm will 
sound.
To cancel the alarm, insert the electronic key in the 
starter switch, or press buttonŒ or‹ on the 
electronic main key; or with the optional KEYLESS-GO-
system, when carrying a KEYLESS-GO-card, by grasping 
a door handle or pressing the start-/stop button on the 
gear selector lever. 

34 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Central locking system
Radio frequency and infrared remote control
The electronic main key has an integrated radio 
frequency and infrared remote control.
Due to the extended operational range of the remote 
control, it could be possible to unintentionally lock or 
unlock the vehicle by pressing the transmit button. If 
one of the transmit buttons is pressed, the battery check 
lamp lights up briefly – indicating that the batteries are 
in order. See page 363 for checking batteries.
The vehicle doors, trunk and fuel filler flap can be 
centrally locked and unlocked via remote control.
Opening and closing the windows and sliding/pop-up 
roof and switching on the driver’s seat ventilation can 
only be done with the infrared portion of the remote 
control. Aim transmitter eye at a receiver (6 or 7), press 
and hold transmit buttonŒor‹, see page 45.
With vehicle centrally locked, the trunk can also be 
opened by using the remote control.
If the electronic key is inserted in starter switch, the 
vehicle cannot be locked or unlocked, and the trunk lid 
cannot be opened with the remote control.1Transmit button
‹Locking
ŒUnlocking
ŠOpening trunk (if not separately locked)
2Lamp for battery check (see page 363 for changing 
batteries if it does not light up briefly)
3PANIC button
4Transmitter eye
5Locking tab for mechanical key
P80.35-2032-26
24
3
5
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36 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Locking and unlocking with remote control
Unlocking:
Press transmit buttonŒ. All turn signal lamps blink 
once to indicate that the vehicle is unlocked.
The remote control can be programmed for two kinds of 
unlocking modes (see below):
Selective unlocking mode –
Press transmit buttonŒonce to unlock driver’s door 
and fuel filler flap.
Press transmit buttonŒ twice to unlock both doors, 
fuel filler flap, and trunk.
Global unlocking mode –
Press transmit buttonŒonce to unlock both doors, 
fuel filler flap, and trunk.
Notes:
If the trunk was previously locked separately, it will 
remain locked, see page 53.
The presently active unlocking mode (selective or 
global) can only be determined by unlocking the vehicle 
with the remote control (see below for changing mode).If within 40 seconds of unlocking with the remote 
control, neither door nor trunk is opened, the electronic 
key is not inserted in the starter switch, or the central 
locking switch is not activated, the vehicle will 
automatically lock.
Locking:
Press transmit button‹ once. All turn signal lamps 
blink three times to indicate that the vehicle is locked. If 
they do not blink three times, a door or trunk is not 
properly closed.
Note:
If the vehicle cannot be locked or unlocked by pressing 
the transmit button, then it may be necessary to change 
the batteries in the electronic main key (if ok, battery 
check lamp in electronic main key will light briefly 
when pressing transmit button) or to synchronize the 
remote control, see pages 363 and 365.