
21 Instruments and controls
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index Overhead control panel 1Interior lighting, see page 159
2Sliding / pop-up roof, see page 157
3Rear view mirror, see page 82
4Garage door opener, see page 180
5Tele Aid (emergency call system), see page 188
6Hands-free microphone for Tele Aid, telephone and 
voice control system
5
6 

22 Contents – Operation
Te ch n i c a l
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 ........................................... 30
Panic button  .................................. 31
Mechanical keys  ........................... 31
Doors .................................................. 32
Central locking switch  .................... 34
Automatic central locking  .............. 35
Emergency unlocking in case of 
accident ........................................ 35
Tailgate .............................................. 36
Antitheft alarm system  ................... 39
Tow-away alarm ................................ 41
Power seats front  ............................. 42
Front seat head restraints  .............. 48Rear seat head restraints  ............... 49
Multicontour seat  .............................51
Seat heater ........................................ 52
Seat ventilation ................................ 55
Seat belts and integrated restraint 
system .......................................... 57
Seat belts  .......................................... 57
Seat belt nonusage warning
system .......................................... 58
BabySmart
TM airbag deactivation 
system .......................................... 65
Self-test BabySmart
TM without 
special child seat installed  ......... 65
Supplemental restraint
system (SRS)  ............................... 66
Emergency tensioning 
device (ETD)  ................................ 67
Airbags .............................................. 68
Safety guidelines for the seat belt, 
emergency tensioning device and 
airbag ........................................... 75
Infant and child restraint
systems ........................................ 77
Steering wheel adjustment  .............81
Rear view mirrors  ........................... 82Instrument cluster  ........................... 86
Multifunction steering wheel, 
multifunction display  ................. 92
Trip and main odometer, vehicle 
speed, FSS and engine oil level 
display .......................................... 96
Audio systems  .................................. 97
Radio .............................................. 97
CD player  ....................................... 98
Cassette player  ............................. 99
Telephone ........................................ 100
Telephone book  .......................... 100
Redialing ..................................... 102
Incoming call  .............................. 104
Navigation system .......................... 105
Trip computer ................................. 106
Malfunction message memory  .... 108
Individual settings ..........................110
Setting the audio volume  ..............113
Flexible service system (FSS)  .......114
Engine oil level indicator ...............117
Engine oil consumption  .................118
Exterior lamp switch  ......................119
Night security Illumination  ......... 120 

23 Contents – Operation
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Headlamp cleaning system  .......... 121
Combination switch  ...................... 122
Rear window wiper / washer  ....... 124
Hazard warning flasher switch  ... 125
Automatic climate control  ............ 126
Display and controls  .................. 128
Basic setting ................................ 129
Special settings  .......................... 129
Defogging windows .................... 129
Defrosting .................................... 129
Rear window defroster  .............. 130
Air distribution  ........................... 130
Air volume ................................... 130
Air recirculation  ......................... 131
Dust filter  .................................... 131
Activated charcoal filter  ............ 132
Residual engine heat 
utilization .................................... 132
Front center console compartment 
ventilation ................................... 133
Rear passenger compartment 
adjustable air outlet  ................... 134Audio and telephone,
operation  ....................................135
Power windows  ...............................154
Sliding / pop-up roof ......................157
Interior lighting  ..............................159
Entrance lamps, exit lamps
in doors  .......................................159
Reading lamps rear 
compartment ..............................160
Sun visors ........................................ 161
Illuminated vanity mirrors  ........... 161
Interior .............................................162
Armrest, rear bench .......................162
Cup holder in rear
bench armrest  ............................162
Glove box  .........................................163
Cup holder and coin holder in 
glove box lid .................................163
Storage compartment above ashtray 
in center console  .......................164
Storage compartments in center 
console ........................................164Cup holder in center console  ....... 165
Ashtrays .......................................... 166
Lighter ............................................. 168
Split rear bench seat  ..................... 169
Rear-facing bench seat  .................. 175
Loading instructions  ..................... 177
Cargo tie-down rings  ..................... 178
Parcel net in front passenger 
footwell ....................................... 178
Cellular telephone  ......................... 179
Garage door opener  ....................... 180 

24 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Ve h i c l e  k e y s
Included with your vehicle are 2 electronic 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 keys are a different color to help 
distinguish it.
Wa r n i n g !
When leaving the vehicle, always remove the 
electronic key from the steering lock, 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 
an accident and/or serious personal injury. 

25 Central locking system
Te ch n i c a l
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, 
tailgate, 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 key.
The infrared receivers are located in the front door 
handles.
Notes:
Remove the mechanical key from the electronic key 
when using valet parking service. To prevent access to 
storage compartments lock them separately and retain 
the mechanical key.
See page 36 for separate locking of tailgate and 
page 163 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.
P80.35-2030-26
1
3
4
2 

26 Central locking system
Te ch n i c a l
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 front door 
handle. Check the batteries of the electronic key, see 
page 304, or synchronize the remote control, see 
page 306.
•Use the mechanical key to unlock the vehicle. To 
start 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. 

27 Central locking system
Te ch n i c a l
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 304 for checking batteries.
The vehicle doors, tailgate 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 ‹.
If the electronic key is inserted in steering lock, the 
vehicle cannot be locked or unlocked with the remote 
control.1Transmit button
‹ Locking
Œ Unlocking
2Lamp for battery check (see page 304 for changing 
batteries if it does not light up briefly)
3PA N I C  b u t t o n
4Transmitter eye
5Locking tab for mechanical key
P80.35-2033-26
2
1
4
3
5 

28 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
6Infrared receiver in driver’s door handle7Infrared receiver in front passenger door handle
6
P80.30-2137-26
7
P80.30-2138-26