
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 

2 Contents
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 inflation pressure 
monitor and 
engine oil level indicator  ......... 124
Audio systems  ................................ 125
Radio ............................................ 125
CD player  ..................................... 126
Cassette player  ........................... 127
Telephone ........................................ 128
Telephone book  .......................... 128
Redialing ..................................... 130Incoming call ...............................131
Navigation system  ..........................132
Distronic (DTR)  ...............................133
Trip computer  .................................134
Malfunction/warning
message memory  ......................136
Individual settings  .........................138
Setting the audio volume  ............. 146
Flexible service system
(FSS) ........................................... 147
Tire inflation
pressure monitor  .......................150
Engine oil level indicator  ..............154
Engine oil consumption  ................155
Exterior lamp switch ......................156
Headlamp mode  ..............................157
Night security illumination  ..........158
Headlamp cleaning system  ...........159
Combination switch  .......................160
Hazard warning flasher
switch ..........................................163
Automatic climate control .............164
Display and controls  ..................166
Dust filter  .....................................167Basic setting  ............................... 168
Special settings  .......................... 169
Air recirculation  ......................... 171
Activated charcoal filter  ............ 172
Economy mode  ........................... 173
Residual engine heat 
utilization .................................... 174
Switching the automatic 
climate control on and off ......... 175
Front center console storage 
compartment ventilation  .......... 175
Rear window defroster  .................. 176
Rear passenger compartment 
adjustable air outlets  ................ 177
Power windows ............................... 178
Sliding/pop-up roof  ....................... 181
Interior lighting  ............................. 184
Rear window sunshade  ................. 186
Sun visors  ....................................... 187
Vanity mirrors  ................................ 187
Interior ............................................ 188
Storage compartments
and armrests .............................. 188
Glove box  ..................................... 189 

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. 

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 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 189 
for locking of glove box.
P80.35-2031-26
1
3
4
2 

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
1 

38 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
KEYLESS-GO
Important!
For the KEYLESS-GO-system to function properly, the 
operator should observe the following:
•The driver should carry the KEYLESS-GO-card with 
him/her.
•To avoid radio transmission interference, never store 
the KEYLESS-GO-card together with other electronic 
items (e.g. cellular telephones, other KEYLESS-GO-
cards) or metallic objects (e.g. coins, metal foil).
•To lock or unlock the vehicle, the card must be 
recognized by the system as being located outside 
the vehicle. The card must be in close proximity to a 
door or the trunk lid (approx. 3 ft. [1 m]). To activate 
the start/stop button function, the KEYLESS-GO-
card must be recognized by the system as being 
located inside the vehicle.
•If the KEYLESS-GO-card is positioned farther away 
from the vehicle (e.g. inside clothing or a briefcase) 
and can no longer be recognized by the system, the 
vehicle cannot be locked or the engine started via 
the KEYLESS-GO-system.•If the KEYLESS-GO-card is removed from the vehicle 
while the engine is running, or by placing the card 
in front of the center armrest (see page 190), the 
message “CHIP-CARD – NOT RECOGNIZED!” will 
appear repeatedly in the multifunction display, 
seepage318.
Find the card or change its present location (e.g. 
place it on the front passenger seat or insert it in 
shirt pocket).
•If the message “CHIP-CARD – NOT RECOGNIZED” 
is ignored for an extended period of time (approx.15 
minutes), the engine could stop by itself during a 
vehicle stop (e.g. traffic light). The vehicle can then 
no longer be centrally locked or the engine 
restarted. You must first find the card or change its 
present location (e.g. place it on the front passenger 
seat or insert it in shirt pocket). Start the engine 
again. See page 224.
•Do not forget, the engine can be started by anyone 
with a KEYLESS-GO-card that is left inside the 
vehicle. Leaving the chip-card behind when exiting 
and locking the vehicle, the message “CHIP-CARD –
STILL IN VEHICLE” appears in the multifunction 
display, see page 318. 

121 Multifunction steering wheel, multifunction display
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Depending on your vehicle’s equipment, you may use 
the buttons on the multifunction steering wheel to call 
up, control and set the following systems in the 
multifunction display:
1Trip odometer and main odometer, see page 119 and 
page 124
Flexible service system (FSS), see page 147
Tire inflation pressure monitor, see page 150
Engine oil level indicator, see page 154
2Audio systems, see page 125
Radio, see page 125
CD player, see page 126
Cassette player, see page 127
3Telephone, see page 1284Navigation system, see page 132
5Distronic (DTR), see page 253
6Trip computer, see page 134
After start
After reset
Fuel tank content
7Malfunction message memory, see page 136
8Individual settings, see page 138
Press theè orÿ button repeatedly until the 
required system is displayed.
The display advances by one system each time the 
button is pressed.
You may call up additional displays within some of these 
categories by pressing thej or kbutton.