If the seat belt is pulled quickly or sharply, the seat belt retractor locks. The seat belt strap cannot be pulled out any further.
Vehicles with automatic front passenger front airbag shutoff:
Vehicles without automatic front passenger front airbag shutoff:
Seat belt adjustment function Vehicles with PRE-SAFE: If the front seat belt is not pulled tight across your body, the seat belt adjustment may automatically apply a certain tightening force. Do not hold the seat belt tightly while it is adjusting. You can activate and deactivate the seat belt adjustment function using the multimedia system. Releasing seat belts
Activating/deactivating seat belt adjustment via the multimedia system Multimedia system: Vehicle → Vehicle Settings → Belt Adjustment
Seat belt warning function for the driver and front passenger The seat belt warning lamp in the Instrument Display is a reminder that all vehicle occupants must wear their seat belts correctly. The seat belt warning lamp lights up for six seconds every time the vehicle is started. In addition, a warning tone may sound. When the driver's and front passenger's doors are closed and the driver and front passenger have fastened their seat belts, the seat belt warning goes out. In the following cases, the seat belt warning lights up during a journey if:
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Mercedes-Benz C-Class (W205) 2015 - 2021 Owners Manual > Safely transporting children in the vehicle: Activating/deactivating the seat belt's child
special seat belt retractor
WARNING Risk of injury or death if a seat belt is unfastened while the vehicle is in motion If the seat belt is released while the vehicle is in motion, the child restraint system is no longer correctly secured. The child seat safety feature is deactivated and the seat belt is drawn in a bit by the ...