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The system checks the tire pressure and the tire
temperature of the tires installed on the vehicle
by means of a tire pressure sensor.
New tire pressure sensors, e.g. in winter tires,
are automatically taught-in during the first jour‐
ney they are used.
If there is a substantial pressure loss or if the
tire temperature is excessive, a warning will be
given:
via display messages (
page 429)
→
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via the h warning lamp in the instrument
R
cluster (
page 462)
→
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 368).
→
System limitations
The system may be impaired or may not function
in the following situations:
If the tire pressure is set incorrectly
R
If there is a sudden pressure loss caused, for
R
example, by a foreign object penetrating the
tire.
If 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 (
→
R
Checking the tire pressure with the tire pres‐
sure monitoring system
Requirements:
The ignition is switched on.
R
On-board computer:
Service
,
One of the following displays appears:
Current tire pressure of each wheel:
R
Tire pressure will be displayed after driving a
R
few minutes
Tire Pressure Monitor
R
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 status (
on tire temperature (
page 363)
%
The values displayed in the multifunction dis‐
play may deviate from those of the tire pres‐
sure gauge as they refer to sea level. At high
altitudes, the tire pressure values indicated
by pressure gauges are higher than those
shown by the on-board computer. In this
case, do not reduce the tire pressure.
Wheels and tires 367
Tires
.
Active: the teach-in
page 364). Observe the notes
→
page 363).
→
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