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416 Wheels and tires
The tire pressure monitor is only an aid. It is the
driver's responsibility to set the tire pressure to
the recommended cold tire pressure suitable for
the operating situation.
In most cases, the tire pressure monitor will auto-
matically update the new reference values after
you have changed the tire pressure. You can,
however, also update the reference values by
restarting the tire pressure monitor manually
(
page 416).
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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 indicators will appear:
Current tire pressure at 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 for each tire will be 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.
Compare the current tire pressure with the
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recommended tire pressure for the current
operating condition (
page 413). Addition-
/
ally, observe the notes on cold tires
(
page 412).
/
%
The values shown on the driver's display may
deviate from those of the tire pressure gauge
as they refer to sea level. At high elevations,
the tire pressure value indicated by a tire
pressure gauge will be higher than those
shown on the driver's display.
Bear in mind the following related topic:
Notes on tire pressure (
page 412)
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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 412).
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Restart the tire pressure monitoring system in the
following situations:
The tire pressure has changed.
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