Page 395 of 521

394 Practical hintsWhat to do if …Display messages
Possible cause/con-
sequence
Possible solution
Front passenger
airbag
activated
See Operator’s Manual
Monitor the 75 indicator lamp on the center console (
page 27) and 
the multifunction display in the instrument cluster (
page 26) for the following:
With the seat unoccupied and the ignition turned on,
the 75 indicator lamp on the center console should illuminate and re-
main illuminated, indicating that the OCS (
page 81) has deactivated the front 
passenger front air bag.
the message 
Front passenger airbag activated See Operator’s Manual
 or 
the message 
Front passenger airbag deactivated See Operator’s Manual
 
should not appear in the multifunction display at any time the seat is unoccu-
pied. Wait at last 60 seconds for the system to complete the necessary check 
cycles and to make sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again. De-
pending on the front passenger classification sensed by the OCS (
page 81), the 
75 indicator lamp will remain illuminated or go out. 
If above conditions are not met, the system is not working properly. Have the sys-
tem checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!
G
If the 
75
indicator lamp remains
out even after performing the above correc-
tive steps, do not have any children 12 years 
old and under and other small individuals
use the front passenger seat until the sys-
tem has been repaired. 
     
        
        Page 396 of 521

395 Practical hints
What to do if …
Display messages
Possible cause/conse-
quence
Possible solution
Front passenger
airbag
deactivated
See Operator’s Manual
Front passenger front air bag is 
deactivated while driving even 
though an adult or someone 
larger than a small individual is 
occupying the front passenger 
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 
front passenger seat for the following:
Switch off the ignition (
page 36).
Have the front passenger vacate the seat and exit the vehicle.
Adjust the seat in a height position (
page 41).
Make sure that no objects which apply forces to the seat are 
present (e.g. objects such as books, briefcases etc. lodged under-
neath, behind or around the seat). Such forces may cause the sys-
tem to sense that an occupant of a lesser weight than actually 
present is on the front passenger seat.
Keep the seat unoccupied, close the front passenger door and turn 
on the ignition (
page 36).
(Continued on next page) 
     
        
        Page 397 of 521

396 Practical hintsWhat to do if …Display messages
Possible cause/con-
sequence
Possible solution
Front passenger
airbag
deactivated
See Operator’s Manual
Monitor the 75 indicator lamp on the center console (
page 27) and the 
multifunction display in the instrument cluster (
page 26) for the following:
With the seat unoccupied and the ignition turned on,
the 75 indicator lamp on the center console should illuminate and re-
main illuminated, indicating that the OCS (
page 81) has deactivated the front 
passenger front air bag.
the message 
Front passenger airbag activated See Operator’s Manual
 or 
the message 
Front passenger airbag deactivated See Operator’s Manual
 
should not appear in the multifunction display at any time the seat is unoccu-
pied. Wait at last 60 seconds for the system to complete the necessary check 
cycles and to make sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again. De-
pending on the front passenger classification sensed by the OCS (
page 81), the 
75 indicator lamp will remain illuminated or go out. 
If above conditions are not met, the system is not working properly. Have the sys-
tem checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!
G
If the 75 indicator lamp remains 
illuminated with an adult occupant on the 
front passenger seat even after performing 
the above corrective steps, do not have any 
passenger use the front passenger seat until 
the system has been repaired.