Mercedes-Benz GLS 2020 Operator's Manual page 557

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
#
#
#
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.
#
Seat belt warning lamp
* There are objects on the front passenger seat.
flashes
#
& WARNING Risk of injury due to malfunctions in the restraint system
If the restraint system is malfunctioning, restraint system components may be triggered unintentionally or may
not deploy as intended during an accident. This may affect the Emergency Tensioning Devices or airbags, for
example.
Have the restraint system checked and repaired immediately at a qualified specialist workshop.
#
Drive on carefully.
Note the messages on the multifunction display.
Visit a qualified specialist workshop immediately.
Fasten your seat belt( page 38).
/
Remove the objects from the front passenger seat.
Display messages and warning/indicator lamps 555
M M Solutions
page 34).
/