
1 Contents 
IntroductionProduct information  .......................... 7
Operator’s manual  ............................. 8
Where to find it  ................................ 13
Reporting Safety Defects  ................ 15Instruments and controlsInstruments and controls  ............... 18
Center console  .............................. 20
Overhead control panel  ............... 21OperationVehicle keys  ...................................... 24
Start lock-out  .................................... 26
General notes on the 
central locking system  ............... 26
Central locking system  ................... 27
Radio frequency and 
infrared remote control  ............... 27
Opening and closing 
windows and sliding/pop-up 
roof from outside  .......................... 31Panic button  ................................. 32
Mechanical keys  .......................... 32
Doors  ................................................. 33
Central locking switch .................... 35
Automatic central locking  .......... 36
Emergency unlocking in 
case of accident  .......................... 36
Trunk ................................................. 37
Trunk lamp ....................................... 39
Trunk lid release switch  ................ 40
Trunk lid emergency release  ......... 41
Trunk lid emergency release  ........ 42
Antitheft alarm system ................... 43
Tow-away alarm  ............................... 44
Power seats, front  ............................ 45
Front head restraints  ...................51
Rear head restraints  .................... 52
Backrest  ............................................ 54
Multicontour seat  ............................ 55
Heated seats  ..................................... 56
Seat belts and integrated 
restraint system  .......................... 58Seat belts ........................................... 58
Seat belt nonusage 
warning system  ............................ 59
BabySmart
TM airbag 
deactivation system  .................... 65
Self-test BabySmart
TM without 
special child seat installed  ......... 66
Supplemental restraint 
system (SRS)  ................................ 66
Emergency tensioning 
retractor (ETR) ............................. 67
Airbags  .............................................. 68
Safety guidelines for the 
seat belt, emergency tensioning 
retractor and airbag  ..................... 74
Infant and child 
restraint systems  .......................... 76
Adjusting telescoping 
steering column  .......................... 79
Inside rear view mirror  .................. 80
Exterior rear view mirrors  ............. 81
Instrument cluster  ........................... 84
Indicator lamps in the 
instrument cluster  ...................... 86
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22 Contents – Operation
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
OperationVehicle keys  ...................................... 24
Start lock-out  .................................... 26
General notes on the 
central locking system  ............... 26
Central locking system  ................... 27
Radio frequency and 
infrared remote control  ............... 27
Opening and closing 
windows and sliding/pop-up 
roof from outside  .......................... 31
Panic button  .................................. 32
Mechanical keys  ........................... 32
Doors .................................................. 33
Central locking switch  .................... 35
Automatic central locking  .......... 36
Emergency unlocking in 
case of accident  ........................... 36
Trunk  ................................................. 37
Trunk lamp  ....................................... 39
Trunk lid release switch  ................. 40Trunk lid emergency release  ......... 41
Trunk lid emergency release  ........ 42
Antitheft alarm system ................... 43
Tow-away alarm  ............................... 44
Power seats, front  ............................ 45
Front head restraints  ...................51
Rear head restraints  .................... 52
Backrest  ............................................ 54
Multicontour seat  ............................ 55
Heated seats  ..................................... 56
Seat belts and integrated 
restraint system  .......................... 58
Seat belts  .......................................... 58
Seat belt nonusage 
warning system  ............................ 59
BabySmart
TM airbag 
deactivation system  ................... 65
Self-test BabySmart
TM without 
special child seat installed  ......... 66
Supplemental restraint 
system (SRS)  ............................... 66
Emergency tensioning 
retractor (ETR)  ............................ 67Airbags  .............................................. 68
Safety guidelines for the 
seat belt, emergency tensioning 
retractor and airbag  ..................... 74
Infant and child 
restraint systems  .......................... 76
Adjusting telescoping 
steering column  .......................... 79
Inside rear view mirror  .................. 80
Exterior rear view mirrors  ............. 81
Instrument cluster  ........................... 84
Indicator lamps in the 
instrument cluster  ...................... 86
Multifunction steering wheel, 
multifunction display  ................. 90
Trip and main odometer 
and sub menu  .............................. 94
Audio systems  .................................. 95
Radio  .............................................. 95
CD player  ....................................... 96
Cassette player  ............................. 97
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25 Central locking system
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Electronic key
The electronic 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 glove box lock.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 key.
The infrared receivers are located in the door handles.
Notes:
Remove the mechanical key from the electronic key 
when using valet parking service. To prevent access to 
trunk or storage compartments lock them separately 
and retain the mechanical key.
See page 37 for separate locking of trunk and page 154 
for locking of glove box.
Obtaining replacement keys
Your vehicle is equipped with a theft deterrent locking 
system requiring a special key manufacturing process. 
For security reasons, replacement keys can only be 
obtained from your authorized Mercedes-Benz Center.
P80.35-2031-26
1
3
4
2
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26 Central locking system
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Start lock-out
Important!
Removing the electronic key from the steering lock 
activates the start lock-out. The engine cannot be 
started.
Inserting the electronic key in the steering lock 
deactivates the start lock-out.
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).General notes on the central locking system
If the electronic key is inserted in the steering lock, 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 of either door 
handle. Check the batteries of the electronic key, see 
page 283 or to synchronize the remote control, see 
page 285.
•Use the mechanical key to unlock the driver’s door. 
To start the engine, insert the electronic key in the 
steering lock. There could be a slight delay until the 
electronic key can be turned in the steering lock.
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 
steering lock or press buttonŒ or‹ on the 
electronic key.
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27 Central locking system
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Central locking system
Radio frequency and infrared remote control
The electronic 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 283 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 remotely 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 Œ 
or ‹.
With vehicle centrally locked, the trunk can also be 
opened by using the remote control.
If the electronic key is inserted in steering lock, 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 283 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
1
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28 Central locking system
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
6Infrared receiver in driver’s door handle7Infrared receiver in passenger door handle
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29 Central locking system
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Locking and unlocking with remote control
Unlocking:
Press transmit button Œ. 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 button Œ  o nce  to un lock  dr iver’s  d oor 
and fuel filler flap.
Press transmit button Œ twice to unlock both doors, 
fuel filler flap, and trunk.
Global unlocking mode –
Press transmit button Œ  once to unlock both doors, 
fuel filler flap, and trunk.
Notes:
If the trunk was previously locked separately, it will 
remain locked, see page 37.
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 or trunk is opened, the electronic 
key is not inserted in the steering lock, 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 key (if ok, battery check 
lamp in electronic key will light briefly when pressing 
transmit button) or to synchronize the remote control, 
see page 283 and 285.
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31 Central locking system
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Opening and closing windows and 
sliding/pop-up roof from outside
Aim transmitter eye of remote control at a door receiver.
To o pen :
Continue to press transmit button Œ after unlocking 
the vehicle.
The windows and sliding/pop-up roof begin to open 
after approx. 1 second.
To interrupt opening procedure, release transmit 
button.
To c lo se:
Continue to press transmit button ‹ after locking 
the vehicle.
The windows and sliding/pop-up roof begin to close 
after approx. 1 second.
To interrupt closing procedure, release transmit button.Note:
If the windows and sliding/pop-up roof cannot be 
operated automatically by pressing the transmit button 
of t he r emo te c ontr ol then  it m ay  be n ece ssar y to chan ge 
the batteries in the electronic key (if ok, battery check 
lamp in electronic key will light briefly when pressing 
transmit button), or to synchronize the remote control, 
see page 283 and 285.
Wa r n i n g !
Never operate the windows or sliding/pop-up roof if 
there is the possibility of anyone being harmed by 
the opening or closing procedure.In case the procedure causes potential danger, the 
procedure can be immediately halted by releasing 
the remote control button. To reverse direction of 
movement press Œ for opening or ‹ for 
closing.
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