Mercedes-Benz E-Class Sedan Operator's Manual page 412

410 Display messages and warning/indicator lamps
Display messages
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Possible causes/consequences and
* The tire pressure in one or more tires has dropped significantly. The wheel position is displayed.
& WARNING Risk of an accident due to insufficient tire pressure
Tire pressures that are too low pose the following hazards:
The tires may burst, especially as the load and vehicle speed increase.
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The tires may wear excessively and/or unevenly, which may greatly impair tire traction.
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The driving characteristics, as well as steering and braking, may be greatly impaired.
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You could then lose control of the vehicle.
Observe the recommended tire pressure.
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Adjust the tire pressure if necessary.
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Stop the vehicle, paying attention to road and traffic conditions.
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Check the tire pressure and the tires.
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