Owner's Manual - Mercedes-Benz B-Class: Seat Belts

Problem	Possible causes/consequences and solutions
Only in certain countries: the red seat belt warning light remains lit for 6 seconds after the engine starts.	The seat belt warning lamp is intended to remind the driver and front passenger that they must fasten their seat belts. Fasten your seat belt
Only in certain countries: the red seat belt warning light remains lit after the engine starts. An audible warning signal also sounds for up to 6 seconds.	The driver has not fastened the seat belt. Fasten your seat belt The warning signal stops.
After the engine starts, the red seat belt warning light comes on as soon as the driver's or front passenger's door is closed.	You or the passenger have not fastened your seat belt. Fasten your seat belt. The warning lamp goes out. Objects are on the front passenger seat. Remove the objects from the front passenger seat and store them in a safe place. The warning lamp goes out.
The red seat belt warning light flashes and a periodic warning tone sounds.	You or the passenger have not fastened your seat belt. However, you are driving faster than 25 km/h or have briefly exceeded 25 km/h . Fasten your seat belt. The warning lamp goes out and the intermittent warning signal stops. Objects are on the front passenger seat. However, you are driving faster than 25 km/h or have briefly exceeded 25 km/h . Remove the objects from the front passenger seat and store them in a safe place. The warning lamp goes out and the intermittent warning signal stops.

Seat belts

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