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If there is a substantial pressure loss or if the
tire temperature is excessive, you will be warned
in the following ways:
via display messages (
page 391)
/
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via the h warning lamp in the instrument
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cluster (
page 419)
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The tire pressure monitoring system 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. Set the tire
pressure for cold tires using a tire pressure
gauge. Note that the correct tire pressure for the
current operating situation must first be taught-
in to the tire pressure monitoring system.
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
system manually (
page 328).
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System limits
The system may be impaired or may not function
in the following situations:
the tire pressure has been set incorrectly
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there is a sudden pressure loss caused, for
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example, by a foreign object penetrating the
tire
there is a malfunction caused by another
R
radio signal source
Make sure to observe the following further rela‐
ted subject:
notes on tire pressure (
page 322)
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Checking the tire pressure with the tire pres‐
sure monitoring system
Requirements:
The ignition is switched on.
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On-board computer:
Service
Tires
4
5
One of the following displays appears:
Current tire pressure and tire temperature of
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the individual wheels:
Wheels and tires 327
Tire pressure will be displayed after driving a
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few minutes
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 moni‐
tored.
Compare the tire pressure with the recom‐
#
mended tire pressure for the current operat‐
ing condition (
page 324). Observe the
/
notes on tire temperature (
page 322).
/
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