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292 Wheels and tires
and then remain continuously illuminated.
This sequence will continue upon subsequent
vehicle start-ups as long as the malfunction
exists.
When the malfunction indicator is illumina‐
ted, the system may not be able to detect or
signal low tire pressure as intended. TPMS
malfunctions may occur for a variety of rea‐
sons, including the installation of incompati‐
ble replacement or alternate tires or wheels
on the vehicle that prevent the TPMS from
functioning properly.
Always check the TPMS malfunction telltale
after replacing one or more tires or wheels
on your vehicle to ensure that the replace‐
ment or alternate tires and wheels allow the
TPMS to continue to function properly.
The system checks the tire pressure and the tire
temperature of the tires installed on the vehicle
by means of a tire pressure sensor.
The tire pressure and the tire temperature
appear in the multifunction display
(
page 292).
/
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 361)
/
R
Via the h warning lamp in the instrument
R
cluster
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.
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 379).
/
System limits
The system may be impaired or may not function
particularly in the following situations:
The tire pressure has been set incorrectly
R
There is a sudden pressure loss caused, for
R
example, by a foreign object penetrating the
tire
There is a malfunction caused by another
R
radio signal source
Checking the tire pressure with the tire pres‐
sure monitoring system
Requirements:
The ignition is switched on.
R
Driver display:
Service
Tires
4
5
One of the following displays appears:
Current tire pressure and tire temperature of
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the individual wheels:
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