Mercedes-Benz A-Class 2020 Operator's Manual page 401

Warning/indicator lamp Possible causes/consequences and
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The yellow tire pressure monitoring system warning lamp (pressure loss/malfunction) flashes for approximately one
minute and then remains lit.
*The tire pressure monitoring system is defective.
Tire pressure monitoring
& WARNING There is a risk of an accident if the tire pressure monitoring system is malfunctioning
system warning lamp
flashes
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Stop the vehicle, paying attention to road and traffic conditions.
Check the tire pressure and the tires.
If the tire pressure monitoring system is malfunctioning, it is not able to issue a warning if there is pressure loss
in one or more of the tires.
Underinflated tires may, for example, impair the driving, steering and braking characteristics.
Have the tire pressure monitoring system checked at a qualified specialist workshop.
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Visit a qualified specialist workshop.
Display messages and warning/indicator lamps 399
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