Page 81 of 491

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. 
     
        
        Page 371 of 491

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.  
     
        
        Page 372 of 491

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) 
     
        
        Page 373 of 491
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.