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The tire pressure monitoring system is only an aid.
It is the driver's responsibility to set the tire pres-
sure to the recommended cold tire pressure suita-
ble for the operating situation.
In most cases, the tire pressure monitoring sys-
tem will automatically update the new reference
values after you have changed the tire pressure.
You can, however, also update the reference val-
ues by restarting the tire pressure monitoring sys-
tem manually (
page 415).
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System limits
The system may be impaired or may not function
particularly in the following situations:
incorrect reference values were taught in
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sudden pressure loss caused by a foreign
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object penetrating the tire, for example
there is a malfunction caused by another radio
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signal source
▌Checking the tire pressure with the tire pres-
sure monitoring system
Requirements
The vehicle is switched on.
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Driver's display:
©
Service
4
5
Press a to confirm.
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One of the following displays appears:
Current tire pressure of each wheel:
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Tire pressure displayed after driving for a
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few
minutes.: current values are not yet
known to the system. The pressure/tempera-
ture values of each tire are displayed as soon
as they are known to the system.
Tire Pressure Monitor
Active: the teach-in
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process of the system is not yet complete. The
tire pressures are already being monitored.
Wheels and tires 415
Compare the current tire pressures with the
#
recommended tire pressures for the current
operating condition (
page 412). Addition-
/
ally, observe the notes on cold tires
(
page 411).
/
%
The values displayed in the driver's display
may deviate from those of the tire pressure
gauge as they refer to sea level. At high eleva-
tions, the tire pressure values indicated by a
tire pressure gauge are higher than those
shown in the driver's display.
Bear in mind the following related topic:
Notes on tire pressure (
page 411)
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▌Restarting the tire pressure monitoring system
Requirements
The recommended tire pressure is correctly
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set for the respective operating status on each
of the four wheels (
page 411).
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Restart the tire pressure monitoring system in the
following situations:
The tire pressure has changed.
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