Page 23 of 325
20 Instruments and controls
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
Center console1ESP control switch, see page 219
2Program mode selector switch, see page 198
3Switch for rear window sunshade, see page 151
4Airbag Off indicator lamp, see page 230
5Left power window switch, see page 146
6Trunk lid release switch, see page 40
7Mirror adjustment switch, see page 79
8Right power window switch, see page 146
P68.10-2192-27
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5
1
6
7
8
43 
         
        
        
     
        
        Page 24 of 325
21 Instruments and controls
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index Overhead control panel1Interior lighting, see page 150
2Sliding / pop-up roof, see page 148
3Tele Aid (emergency call system), see page 178
4Hands-free microphone for Tele Aid, telephone and 
voice recognition system.
5Rear view mirror, see page 78
6Garage door opener, see page 164
1
1
6
P82.00-2049-27
5
2
3
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22 Contents – Operation
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
OperationVehicle keys  ...................................... 24
Start lock-out  .................................... 27
General notes on the 
central locking system  ............... 27
Central locking system  ................... 28
Radio frequency and 
infrared remote control  ............... 28
Opening and closing windows 
and sliding/pop-up roof 
from outside  .................................. 32
Panic button  .................................. 33
Mechanical keys  ........................... 33
Doors .................................................. 34
Central locking switch  .................... 36
Automatic central locking  .......... 37
Emergency unlocking in 
case of accident  ........................... 37
Trunk ................................................. 38
Trunk lid release switch  ................. 40
Trunk lid emergency release  ......... 41
Antitheft alarm system  ................... 42Tow-away alarm  ............................... 44
Power seats, front ............................ 45
Front head restraints  ...................51
Head restraints, rear  ................... 52
Backrest ............................................ 53
Multicontour seat  ............................ 54
Heated seats  ..................................... 55
Seat belts and integrated 
restraint system  .......................... 57
Seat belts  .......................................... 57
Seat belt nonusage 
warning system ............................ 58
BabySmart
TM airbag 
deactivation system  ................... 64
Self-test BabySmart
TM 
without special child 
seat installed  ................................ 64
Supplemental restraint 
system (SRS)  ............................... 65
Emergency tensioning 
retractor (ETR)  ............................ 65Airbags .............................................. 66
Safety guidelines for the seat belt, 
emergency tensioning retractor 
and airbag  ..................................... 72
Infant and child 
restraint systems .......................... 74
Adjusting telescoping 
steering column  .......................... 77
Inside rear view mirror  .................. 78
Exterior rear view mirrors  ............. 79
Instrument cluster  ........................... 82
Indicator lamps in the 
instrument cluster  ...................... 84
Multifunction steering wheel, 
multifunction display  ................. 88
Trip and main odometer, vehicle 
speed, FSS and engine oil level 
indicator ....................................... 92
Audio systems  .................................. 93
Radio .............................................. 93
CD player  ....................................... 94
Cassette player  ............................. 95 
         
        
        
     
        
        Page 26 of 325

23 Contents – Operation
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Telephone .......................................... 96
Telephone book  ............................ 96
Redialing ....................................... 98
Incoming call  .............................. 100
Navigation system .......................... 101
Trip computer  ................................. 102
Malfunction message 
memory ...................................... 104
Individual settings ......................... 106
Setting the audio volume .............. 108
Flexible service system 
(FSS) ............................................ 109
Engine oil level indicator .............. 112
Engine oil consumption  .................113
Exterior lamp switch  ......................114
Night security illumination  ..........115
Headlamp cleaning system  ...........116
Combination switch  .......................117
Hazard warning flasher 
switch ...........................................119Automatic climate control ............ 120
Display and controls  ................. 122
Basic setting  ............................... 122
Economy ...................................... 123
Special settings  .......................... 123
Rear window defroster .............. 124
Air recirculation  ........................ 125
Residual engine 
heat utilization  ........................... 125
Dust filter  .................................... 126
Audio and telephone, 
operation .................................... 127
Power windows  .............................. 146
Sliding/pop-up roof  ....................... 148
Interior lighting  ..............................150
Rear window sunshade  .................151
Sun visors ........................................151
Illuminated vanity mirrors  ...........152
Interior .............................................152Storage compartments, 
armrest and cup holder  ........... 152
Glove box  ..................................... 153
Storage compartments 
in center console  ........................ 153
Ashtrays .......................................... 156
Lighter ............................................. 158
Enlarged cargo area – 
split folding rear 
seat backrest  .............................. 159
Loading instructions  ..................... 160
Cargo tie down rings  ..................... 162
Parcel net in front 
passenger footwell  .................... 162
Telephone, general  ........................ 163
Cellular telephone  ......................... 163
Garage door opener  ....................... 164
Ski sack  ........................................... 168 
         
        
        
     
        
        Page 27 of 325
24 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Ve h i c l e  k ey s
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 it.
•1 electronic reserve key without remote control 
functions, plus removable mechanical key.
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 
serious personal injury. 
         
        
        
     
        
        Page 28 of 325

25 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.
Notes:
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 38 for separate locking of trunk and page 153 
for locking of glove box.
P80.35-2031-26
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3
4
2 
         
        
        
     
        
        Page 29 of 325

26 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, but with removable mechanical key.The electronic reserve key (1) works only in the steering 
lock. There are no batteries inside the electronic reserve 
ke y.
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.
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.
P80.35-2036-26
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        Page 30 of 325

27 Central locking system
Te ch n ica 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 door 
handle. Check the batteries of the electronic main 
key, see page 281, or synchronize the remote 
control, see page 283.
•Use the mechanical key to unlock the driver’s door. 
To start the engine, insert the electronic main key in 
the steering lock. There could be a slight delay until 
the electronic main 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 main key.