See also:

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

Folding the rear seat backrest forward
The left-hand and right-hand rear seat backrests can be folded forwards separately to increase the cargo compartment capacity. The combined cargo cover and net can remain installed. ! When fol ...

High-beam spot lamp (vehicles with LED-daytime running lamps)/infrared light (Night View Assist Plus)
Due to their location, have the bulbs in the left-hand headlamp changed at a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center. Switch off the lights. Open the hood. ...