Mercedes-Benz E CLASS 2020 Operator's Manual page 498

496 Display messages and warning/indicator lamps
Warning/indicator lamp Possible causes/consequences and
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7
The red seat belt warning lamp flashes and an intermittent warning tone sounds.
* The driver or front passenger has not fastened their seat belt while the vehicle is in motion.
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Seat belt warning lamp
* There are objects on the front passenger seat.
flashes
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7
The red seat belt warning lamp will light up for six seconds once the engine has started.
In addition, a warning tone may sound.
*The seat belt warning lamp reminds the driver and front passenger to fasten their seat belts.
Seat belt warning lamp
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lights up
If you have placed objects on the front passenger seat, the seat belt warning lamp may remain lit.
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Drive on carefully.
Note the messages on the multifunction display.
Consult a qualified specialist workshop immediately.
Fasten your seat belt( page 40).
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Remove the objects from the front passenger seat.
Fasten your seat belt ( page 40).
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Solutions