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478 Display messages and warning/indicator lamps
Display messages
Possible causes/consequences and
Tire Pressure Monitor Inop-
* The wheels installed do not have suitable tire pressure sensors. The tire pressure monitoring system is deactivated.
erative Tire Pressure Sen-
sors Missing
é
* There is no signal from the tire pressure sensor in at least one wheel. No pressure value is displayed for the affected
Wheel Sensor(s) Missing
é
* The tire pressure in one or more tires has dropped significantly.
Check Tires
Solutions
M
& WARNING There is a risk of an accident if the tire pressure monitoring system is malfunctioning
The tire pressure monitoring system cannot issue a warning if there is pressure loss in one or more of the tires.
Tires with insufficient tire pressure may impair the driving characteristics as well as steering and braking.
Have the tire pressure monitoring system checked at a qualified specialist workshop.
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Install wheels with suitable tire pressure sensors.
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tire.
Have the faulty tire pressure sensor replaced at a qualified specialist workshop.
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The wheel position is displayed. A warning tone will also sound.
& WARNING Risk of an accident due to insufficient tire pressure
The tires can burst.
R
The tires can wear excessively and/or unevenly.
R
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