Mercedes-Benz E-Class: System self-test - Occupant Classification System 
(OCS) - Occupant safety - Safety - Mercedes-Benz E-Class Owners ManualMercedes-Benz E-Class: System self-test

The when you: indicator lamp illuminates when you:

- turn the SmartKey to position 1 or 2 in the ignition lock
- on vehicles with KEYLESS-GO, press the Start/Stop button once or twice

If an adult occupant is properly sitting on the passenger seat and the OCS classifies the occupant as an adult, the lamp illuminates and goes out again after indicator lamp illuminates and goes out again after approximately 6 seconds.

If the seat is not occupied and the OCS classifies the front passenger seat as being unoccupied, the will illuminate and not go out. indicator lamp will illuminate and not go out.

WARNING
If the not  indicator lamp does not illuminate, the system is not functioning. You must contact an authorized Mercedes-Benz Center before seating any child on the front passenger seat.

For more information, see "Problems with the Occupant Classification System"

WARNING
Never place anything between seat cushion and child seat (e.g. a pillow), since it reduces the effectiveness of the OCS. The underside and rear side child restraint system must be placed entirely on the seat cushion and the backrest of the front-passenger seat backrest.

If necessary, adjust the tilt of the passenger seat backrest.

An incorrectly mounted child seat could cause injuries to the child in case of an accident, instead of increasing protection for the child.

Follow the manufacturer's instructions for installation of child restraint systems.

    How the occupant classification system works
    The Occupant Classification System (OCS) categorizes the occupant on the front - passenger seat by means of a weight sensor. The front-passenger front air bag is deactivated automatically for c ...

    Problems with the occupant classification system
    WARNING If the indicator lamp illuminates and remains illuminated when the weight of a typical adult or someone larger than a small individual has been detected on the passenger seat, do ...

    See also:

    Folding the Seatback
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    Memory status
    In phone mode, the memory status of the infotainment system's phone book and the connected cell phone's phone book can be seen in Phone menu Phone book Memory status. ...

    Securing an Add-On Child Restraint in the Vehicle
    WARNING A child can be seriously injured or killed in a crash if the child restraint is not properly secured in the vehicle. Secure the child restraint properly in the vehicle using the vehicle sa ...