Page 358 of 473

357 Practical hints
What to do if …
Left display 
Right display 
Possible cause/consequence
Possible solution
Front passenger 
airbag
enabled
See Oper. Manual
With the seat unoccupied and the ignition switched on,
the 5/indicator lamp between the center air 
vents should illuminate and remain illuminated, indicating 
that the OCS (
page 72) has deactivated the air bag.
the message Front passenger airbag enabled See Oper. 
Manual or the message Front passenger airbag disabled 
See Oper. Manual should not appear in the multifunction 
display at any time the seat is unoccupied. 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 passenger 
seat again. Depending on the passenger classification 
sensed by the OCS (
page 72), the 5/indicator 
lamp will remain illuminated or go out.
If above conditions are not met, the system is not working 
properly. Have the system checked as soon as possible by an 
authorized Mercedes-Benz Center.
Warning!
G
If the 5/ 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 passenger seat until the system has 
been repaired. 
     
        
        Page 359 of 473
358 Practical hintsWhat to do if …Left display 
Right display 
Possible cause/consequence
Possible solution
Front passenger 
airbag
disabled
See Oper. Manual
The 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 39).
Have the passenger vacate the seat and exit the vehicle.
Keep the seat unoccupied, close the passenger door and 
switch on the ignition (
page 39).
Monitor the 5/indicator lamp between the center air 
vents (
page 76) and the multifunction display in the instru-
ment cluster (
page 139) for the following:
(Continued on next page) 
     
        
        Page 360 of 473

359 Practical hints
What to do if …
Left display 
Right display 
Possible cause/consequence
Possible solution
Front passenger 
airbag
disabled
See Oper. Manual
With the seat unoccupied and the ignition switched on,
the 5/indicator lamp between the center air 
vents should illuminate and remain illuminated, indicating 
that the OCS (
page 72) has deactivated the air bag.
the message Front passenger airbag enabled See Oper. 
Manual or the message Front passenger airbag disabled 
See Oper. Manual should not appear in the multifunction 
display at any time the seat is unoccupied. 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 passenger 
seat again. Depending on the passenger classification 
sensed by the OCS (
page 72), the 5/indicator 
lamp will remain illuminated or go out.
If above conditions are not met, the system is not working 
properly. Have the system checked as soon as possible by an 
authorized Mercedes-Benz Center.
Warning!
G
If the 5/indicator lamp remains
illuminated with an adult occupant on the 
passenger seat even after performing the 
above corrective steps, do not have any
passenger use the passenger seat until the 
system has been repaired.