
80 Safety and SecurityOccupant safety
The 75indicator lamp is located 
in the center console.
1Indicator lampThe 75indicator lamp1 will be 
illuminated, except with the SmartKey 
removed or in starter switch position0.
iDeployment of the driver front air bag 
does not mean that the front passenger 
front air bag also should have de-
ployed.
The Occupant Classification System 
(page 76) may have determined: 
that the seat was empty or occu-
p i e d  b y  t h e  w e i g h t  u p  t o  o r  l e s s  t h a n  
that of a typical 12-month-old child 
seated in a standard child restraint 
- both instances where the system 
suppresses deployment of the pas-
senger front air bag even though 
the impact met the criteria and was 
of sufficient severity to deploy the 
driver front air bag. 
that the seat was occupied by a 
small individual (such as a young 
teenager or a small adult) or a child 
weighing more than the weight of a 
typical 12-month-old child in a stan-
dard child restraint - instances 
where the system may suppress de-
ployment of the passenger front air 
bag even though the impact met 
the criteria and was of sufficient se-
verity to deploy the driver front air 
bag. 
Warning!
G
If the 1indicator lamp and the 
75indicator lamp are lit at the 
same time, there is a malfunction in the 
Occupant Classification System. The front 
passenger front air bag will be deactivated 
in this case.
In order to ensure proper operation of the 
airbag system and OCS:
Have the system checked as soon as 
possible by qualified technicians. 
Contact an authorized Mercedes-Benz 
Center.
Do not place more than 4.4 lbs (2 kg) 
into the ruffled storage bag on the back 
of the front passenger seat. Otherwise, 
the OCS may not be able to properly ap-
proximate the occupant weight 
category. 

369 Practical hints
What to do if …
Display
Display messages
Possible cause
Possible solution
Front passenger
airbag activated
see Oper.’s Man.
Front passenger front air 
bag is activated while driv-
ing even though a child, 
small individual, or object 
below the system's weight 
threshold is on the front 
passenger seat, or the 
front passenger seat is 
empty. Objects on the seat 
or forces acting on the seat 
may make the system 
sense supplemental 
weight.
Stop the vehicle in a safe location as soon as possible 
and check the following:
Make sure that there is nothing between seat cush-
ion and child seat and check installation of the child 
seat.
Make sure that no objects applying supplemental 
weight onto the seat are present.
Make sure that no objects which apply forces to the 
seat are present (e.g. objects such as books, brief-
cases etc. lodged behind or around the seat, head 
restraints pushing against roof etc.). The system 
may recognize such forces as supplemental weight 
and sense that an occupant on the front passenger 
seat is of a heavier weight than actually present. 
(Continued on next page) 

370 Practical hintsWhat to do if …Display
Display messages
Possible cause
Possible solution
Front passenger
airbag activated
see Oper.’s Man.
If performing any of the above corrective steps is suc-
cessful, the message 
Front passenger airbag deacti-
vated
 will appear in the multifunction display, 
confirming the situation has been remedied. Note that 
after performing the corrective steps, it may take up to 
60 seconds for the message 
Front passenger airbag 
deactivated
 to appear.
If the message 
Front passenger airbag activated
 
remains on in the multifunction display and/or the 
75indicator lamp remains out even after 
performing the above corrective steps, have the system 
checked as soon as possible by an authorized 
Mercedes-Benz Center.
Do not have any children12 years old and under and 
other small individuals use the front passenger seat un-
til the system has been repaired.
Warning!
G
If the message 
Front passenger airbag 
activated
 remains on in the multifunction 
display and/or the 75indicator 
lamp remains out even after performing the 
above corrective steps, do not have any 
children12 years old and under and other 
small individuals use the front passenger 
seat until the system has been repaired.  

371 Practical hints
What to do if …
Display
Display messages
Possible cause
Possible solution
Front passenger
airbag deactivated
see Oper.’s Man.
Front passenger front air 
bag is deactivated while 
driving even though an 
adult or someone larger 
than a small individual is 
occupying the front pas-
senger seat. Forces acting 
on the seat may make the 
system sense a decrease 
in weight.
Stop the vehicle in a safe location as soon as possible 
and check the following:
Do not lean on armrests or lift yourself up using han-
dle over the door.
Adjust the seat in a height position (
page 39).
Make sure that no objects which apply forces to the 
seat are present (e.g. objects such as books, brief-
cases etc. lodged underneath, behind or around the 
seat). Such forces may cause the system to sense 
that an occupant of a lesser weight than actually 
present is on the front passenger seat.
Re-position yourself.
Sit properly belted in a nearly upright position with 
your back against the seat backrest.
If performing any of the above corrective steps is 
successful, the message 
Front passenger airbag 
activated
 will appear in the multifunction display, 
confirming the situation has been remedied.
(Continued on next page) 

372 Practical hintsWhat to do if …Display
Display messages
Possible cause
Possible solution
Front passenger
airbag deactivated
see Oper.’s Man.
Note that after performing the corrective steps, it may 
take up to 60 seconds for the message 
Front passen-
ger airbag activated
 to appear.
If the message 
Front passenger airbag deactivated
 
remains on in the multifunction display and/or the 
75indicator lamp remains on even after 
performing the above corrective steps, have the system 
checked as soon as possible by an authorized 
Mercedes-Benz Center.
Do not have any passenger use the front passenger seat 
until the system has been repaired.
Warning!
G
If the message 
Front passenger airbag 
deactivated remains on in the multifunc-
tion display and/or the 75 indica-
tor lamp remains illuminated even after 
performing the above corrective steps, do 
not have any passenger use the front pas-
senger seat until the system has been re-
paired.  

466 IndexAir recirculation mode 204, 216
Activating 204, 216
Deactivating 205, 217
Air vents, rear passenger compartment
Adjustable 219
Air volume
Adjusting 202, 215
Airbags 63
Children 64
Front 67
Passenger 67
Safety guidelines 66
Side impact 68
Window curtain 68
Airmatic DC (Dual Control)* 244
Alarm
Audible 86, 99
Canceling 99
Visual 98
Alarm system
Anti-theft 98
Alignment bolt (vehicle tool kit) 403, 
421, 459
Ambient lighting 149
Antilock brake system (ABS) 459Anti-theft alarm system
Arming 98
Canceling alarm 99
Disarming 98
Anti-theft systems 97
Anti-theft alarm system 98
Immobilizer 97
Tow-away alarm 99
Aquaplaning see Hydroplaning 289
Ashtray 265
Aspect ratio 332
At the gas station 296
AUDIO menu 158
Selecting radio station 158
Selecting satellite radio* station 159
Audio system
CD mode 159
Auto-dimming mirror 191
Automatic central locking
Activating/deactivating (control 
system) 174
Automatic climate control (4-zone*) 208
Adjusting air distribution 214
Adjusting air volume 215
Air conditioning 218
Air recirculation mode 216Deactivating 213
Defrosting 215
Residual heat utilization 219
Residual ventilation 219
Setting the temperature 214
Automatic climate control 
(Dual-zone) 196
Adjusting air distribution 201
Adjusting air volume 202
Air conditioning 206
Air recirculation mode 204
Deactivating 201
Defrosting 203
Residual heat utilization 207
Residual ventilation 207
Setting the temperature 201
Automatic headlamp mode 142
Automatic lighting control
Activating 147
Deactivating 147
Automatic locking when driving 122 

468 IndexCargo tie-down rings 251
CD player
Operating 159
Center console
Lower part 28
PASS AIR BAG OFF indicator 
lamp 360
Upper part 27
Centigrade
Setting temperature units 165
Central locking
From inside 122
Switch 122
Switching on/off (control 
system) 174
Unlocking from inside 122
Central locking switch 122
Changing
Batteries (SmartKey with 
KEYLESS-GO*) 408, 409
Batteries (SmartKey) 408, 409
SmartKey setting 175
Vehicle level 246
Charging
Vehicle batteries 427CHECK ENGINE malfunction indicator 
lamp 355
Checking
Coolant level 303
Oil level 297, 300
Tire inflation pressure 297
Vehicle lighting 297
Child safety 73
Airbags 64
Infant and child restraint systems 69, 
73
LATCH child seat anchors 83
Child safety switch see Blocking of rear 
window operation 84
Cigarette lighter 266
Cleaning
Headlamps 191
Windshield 53
Wood trims 350
Cleaning tires 309
Clock 168Closing
Glove box 259
Power tilt /sliding sunroof* 225
Side windows 222
Tailgate
Vehicle with KEYLESS-GO* 119, 
121
Windows 221
Closing the tailgate 117, 119, 121
Closing the tailgate from the outside (vehi-
cles without KEYLESS-GO*) 118
Cockpit 22, 459
Cockpit management and data system 
(COMAND) 460
Cold tire inflation pressure 333
Collapsible wheel chock 403
COMAND 460
COMAND* see separate operating instruc-
tions
Combination switch 145
Turn signals 51
Windshield wipers 52
Comfort driving
Transmission program mode 188 

472 IndexEngine oil
Adding 302
Checking level 300
Consumption 300
Display messages 382
Messages in display 301
Viscosity 460
ESP 89, 460
Four wheel electronic traction system 
with ESP 95
Switching off 91
Switching on 92
Synchronizing 367
Warning lamp 353
ETD 460
Safety guidelines 66
Exterior lamp switch 141
Exterior rear view mirrors
Adjusting 42
Parking position for 176
F
Fahrenheit
Setting temperature units 165
Fastening the seat belts 44
Fine adjustment
Cruise control 231First aid kit 401
Flat tire 418
Mounting the spare wheel 419
Spare wheel 419
Flexible Service System (FSS) 461
Floormats 268
Fog lamp, rear 145
Fog lamps
Switching on 144
Fog lamps, front
Messages in display 386
Switching on 144
Folding back folding bench seat 136
Folding bench seat in cargo 
compartment 134
Folding head restraints back 127
Following distance in Distronic* 239
Four wheel electronic traction system 
(4MATIC) with ESP 95
4MATIC 95
4-zone automatic climate control* 208
Front airbags 67
Front doors
Opening from inside vehicle 115
Front fog lamp
Replacing bulb 411Front interior lighting 148
Front lamps 411
Messages in display 387
Replacing bulbs 413
Switching on 141
Front reading lamps
Switching on/off 148
Front seat head restraints
Power seat 126
Removing and installing 126
Front seats
Heater* 132
FSS (Flexible Service System) 461
Fuel 297
Fuel tank reserve warning lamp 357
Premium unleaded gasoline 297
Fuel consumption statistics
After start 178
Since last reset 178
Fuel filler flap 296
Locking 296
Unlocking 296
Fuel reserve tank
Message in display 385
Fuel tank
Filler flap 296