
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  ............... 33
Central locking system  ................... 34
Radio frequency and
infrared remote control  ............... 34
KEYLESS-GO ................................. 38Opening 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  .................. 66
Front seat adjustment ..................... 67
Removal and installation
of front seat head restraints  ..... 72
Lumbar support  ............................... 73Multicontour backrest ..................... 73
Seat heater  ........................................ 75
Seat ventilation system  ................... 78
Rear seat head restraints  ................ 80
Power head restraints, rear  ............ 81
Power seats, rear .............................. 82
Seat belts and integrated
restraint system  .......................... 84
Seat belts  ........................................... 84
Seat belt nonusage
warning system  ........................... 85
BabySmart
TM airbag
deactivation system  .................... 91
Self-test BabySmart
TM 
without special child
seat installed  ................................. 91
Supplemental Restraint 
System (SRS)  ............................... 92
Emergency tensioning
retractor (ETR) ............................. 93
Airbags .............................................. 94
Safety guidelines for the
seat belt, emergency 
tensioning retractor
and airbag  .................................. 100 

5 Contents
Practical hintsFirst aid kit  .....................................328
Stowing things in the vehicle  ......328
Fuses ................................................329
Hood ................................................. 331
Checking engine oil level  .............334
Automatic transmission
fluid level  ...................................335
Active body control 
(ABC) fluid level ........................335
Coolant level  ...................................336
Adding coolant  ...........................336
Windshield and
headlamp washer system  ........337
Windshield and
headlamp washer fluid
mixing ratio  ................................337
Spare wheel, vehicle tools, 
storage compartment ................338
Vehicle jack .....................................339
Wheels .............................................340
Tire Replacement  .......................340
Rotating wheels  .......................... 341
Spare wheel  .................................... 341Changing wheels  ........................... 343
Tire inflation pressure  ................. 348
Battery ............................................. 349
Jump starting  ................................. 351
Towing the vehicle  ........................ 353
Exterior lamps  ............................... 356
Headlamp assembly  .................. 357
Taillamp assemblies  .................. 360
Trunk lamp ..................................... 362
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  ......................... 368
Emergency operation of 
sliding/pop-up roof  .................. 369
Replacing wiper blades  ................ 370
Roof rack  ..........................................371
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  ......................377
Cleaning the Distronic 
system sensor  .............................378
Cleaning the parktronic 
system sensors  ...........................378
Wiper blades  ...............................379
Light alloy wheels  ......................380
Instrument cluster  .....................380
Steering wheel and
gear selector lever ......................380
Cup holder ...................................380
Seat belts  ..................................... 381 

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  ..... 72
Lumbar support  ............................... 73
Multicontour backrest  .................... 73
Seat heater ........................................ 75
Seat ventilation system  .................. 78
Rear seat head restraints  ............... 80
Power head restraints, rear  ............ 81
Power seats, rear  ............................. 82
Seat belts and integrated
restraint system  .......................... 84
Seat belts  .......................................... 84
Seat belt nonusage
warning system  .......................... 85
BabySmart
TM airbag
deactivation system  ....................91Self-test BabySmart
TM 
without special child
seat installed  ................................. 91
Supplemental Restraint 
System (SRS)  ............................... 92
Emergency tensioning
retractor (ETR) ............................. 93
Airbags .............................................. 94
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
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 

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. 

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 front door 
handles.
Note:
Remove the mechanical key from the electronic main 
key when using valet parking service. To prevent access 
to trunk or storage compartments lock them separately 
and retain the mechanical key.
See page 53 for separate locking of trunk and page 194 
for locking of glove box.
P80.35-2031-26
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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
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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 front 
door handle. Check the batteries of the electronic 
main key, see page 363, or synchronize the remote 
control, see page 365.
•Use the mechanical key to unlock 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.
•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 button Œor ‹, 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
Œ Unlocking
Š Opening 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
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