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T T yr yre pr
e pressur
essure monit
e monitor oring syst
ing system
em
F F unction of t
unction of the tyr
he tyre pr
e pressur
essure monit
e monitor oring syst
The system checks the tyre pressure and the tyre
temperature of the tyres tted to the vehicle by
means of a tyre pressure sensor.
The tyre pressure and the tyre temperature
appear in the driver's display.
If there is a substantial pressure loss or if the tyre
temperature is excessive, you will be warned with
display messages (
page 423) or the h
/
warning lamp in the driver's display
(
page 443).
/
The tyre pressure monitoring system is only an
aid. It is the driver's responsibility to set the tyre
pressure to the recommended cold tyre pressure
suitable for the operating situation.
In most cases, the tyre pressure monitoring sys-
tem will automatically update the new reference
values a er you have changed the tyre pressure.
You can, however, also update the reference val-
ues by restarting the tyre pressure monitoring
system manually (
page 348).
/
System limits
Syst
em limits
The system may be impaired or may not function
ing system
em
particularly in the following situations:
incorrect reference values were taught in
R
sudden pressure loss caused by a foreign
R
object penetrating the tyre, for example
there is a malfunction caused by another radio
R
signal source
Checking t
Chec
king the tyr
he tyre pr
monitor oring syst
monit
ing system
R R eq equir uirements:
ements:
The vehicle is switched on.
R
Driver's display:
©
4
5
Press a to con rm.
#
One of the following displays appears:
Current tyre pressure of each wheel:
R
e pressur
essure wit
e with t h the tyr
he tyre pr
e pressure
essure
em
Service
Wheels and tyres 347
Tyre pressures will be displayed after a few
R
minutes of
driving: current values are not yet
known to the system. The pressure/tempera-
ture values of each tyre are displayed as soon
as they are known to the system.
Tyre pressure monitor
active: the teach-in
R
process of the system is not yet complete. The
tyre pressures are already being monitored.
Compare the current tyre pressure with the
#
recommended tyre pressure for the current
operating condition (
page 346). Addition-
/
ally, observe the notes on cold tyres
(
page 345).
/
347
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