Wheels and tires
297
values aꢄer 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 298).
the low tire pressure telltale illuminates, you
should stop and check your tires as soon as
possible, and inꢂate them to the proper pres-
sure. Driving on a signiꢀcantly under-inꢂated
tire causes the tire to overheat and can lead
to tire failure. Under-inꢂation also reduces fuel
eꢁciency and tire tread life, and may aꢃect
the vehicle’s handling and stopping ability.
Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the driv-
er’s responsibility to maintain correct tire
pressure, even if under-inꢂation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS malfunc-
tions may occur for a variety of reasons,
including the installation of replacement or
alternate tires or wheels on the vehicle that
prevent the TPMS from functioning properly.
System limits
The system may be impaired or may not function
particularly in the following situations:
R
Incorrect reference values were taught in
The system checks the tire pressure and the tire
temperature of the tires installed on the vehicle by
means of a tire pressure sensor.
R
Sudden pressure loss caused by a foreign
object penetrating the tire, for example
R
There is a malfunction caused by another
radio signal source
The tire pressure and the tire temperature appear
in the on-board computer (/ page 297).
If there is a substantial pressure loss or if the tire
temperature is excessive, you will be warned with
display messages (/ page 379) or the h
warning lamp in the instrument cluster
(/ page 399).
Checking the tire pressure with the tire pressure
monitoring system
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined with
the low tire pressure telltale. When the system
detects a malfunction, the telltale will ꢂash for
approximately one minute and then remain
continuously illuminated. This sequence will
continue upon subsequent vehicle start-ups as
long as the malfunction exists.
Requirements:
R
The vehicle is switched on.
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.
On-board computer:
5
4
Service
One of the following displays appears:
Tires
R
Current tire pressure and tire temperature of
the individual wheels:
In most cases, the tire pressure monitoring sys-
tem will automatically update the new reference
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