Mercedes-Benz C-Class Convertible 2021 Operator's Manual page 451

Occupant safety
Warning/indicator lamp
Possible causes/consequences and
6
* The red restraint system warning lamp is lit while the engine is running.
The restraint system is malfunctioning (
Restraint system warning
lamp
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* The red seat belt warning lamp flashes and an intermittent warning tone sounds.
or
The red seat belt warning lamp lights up for six seconds once the engine has started.
Seat belt warning lamp
In addition, an intermittent warning tone may sound.
The red seat belt warning lamp flashes and an intermittent warning tone sounds:
The driver or front passenger has not fastened his or her seat belt while the vehicle is in motion.
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There are objects on the front passenger seat.
& WARNING Risk of injury due to malfunctions in the restraint system
Components in the restraint system may be activated unintentionally or not deploy as planned in an accident.
Have the restraint system checked and repaired immediately at a qualified specialist workshop.
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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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Display messages and warning/indicator lamps 449
M M Solutions
page 36).
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