Mercedes-Benz E-Class Wagon Operator's Manual page 440

438 Display messages and warning/indicator lamps
Tires
Display messages
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Possible causes/consequences and
* The tire pressure is too low in at least one of the tires, or the tire pressure difference between the wheels is too
great.
Check the tire pressure and add air, if necessary.
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When the tire pressure is correct, restart the tire pressure monitoring system.
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* 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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