Wheels and tires
MOBILITY
Functional requirements
The following prerequisites must be met for
the system; otherwise, reliable notification of a
tire pressure loss is not assured:
Tire pressure monitor
Principle
The Tire Pressure Monitor monitors the tire
pressure and issues a warning if the tire pres-
sure has dropped.
▷
After each tire or wheel change, the system
detects and updates the mounted tires on
the control display and displays them after
a short trip.
General information
Sensors in the tire valves measure the tire in-
flation pressure and tire temperature.
Enter the information about the mounted
tires in the tire settings when the system
does not automatically detect the tires.
Depending on the tires detected or registered,
the system displays the specified nominal
pressures on the control display and compares
them with the current tire pressures.
▷
▷
The Tire Pressure Monitor does not acti-
vate until after driving for a few minutes:
▷
▷
After a tire or wheel change.
After a reset, when using tires with spe-
cial approval.
If tires are being used that are not specified
in the tire inflation pressure details on the ve-
hicle such as tires with special approval, the
system needs to be actively reset. The system
will then take over the actual tire inflation pres-
sures as the target pressures.
▷
After changing the tire setting.
For tires with special approval:
▷
After a tire or wheel change, a reset was
performed with the correct tire inflation
pressure.
When operating the system, also note the in-
formation found in the Tire inflation pressure
chapter.
▷
After the tire inflation pressure was ad-
justed to a new value, a reset was per-
formed.
Additional information:
Tire inflation pressure, refer to page 301.
▷
Wheels with air pressure sensor.
Safety information
Tire settings
General information
Warning
The information about the mounted tires can
be entered in the tire settings if the system
does not automatically detect the tires.
The display of the target pressures is not
a substitute for the tire inflation pressure de-
tails on the vehicle. Incorrect entries in the
tire settings can lead to incorrect target tire
inflation pressure values. In this case, it can-
not be guaranteed that the notification of a
tire pressure loss will be reliable. There is a
risk of injury and risk of property damage.
Make sure that the sizes of your mounted
tires are displayed correctly and match the
information on the tires and the tire inflation
pressure specifications on the vehicle.
The tire sizes of the mounted tires can be
gathered from the tire inflation pressure details
on the vehicle or directly on the tires.
The tire details do not need to be re-entered
when the tire pressure is corrected.
For summer and winter tires, the tire details
entered last are stored. After a tire or wheel
change, the settings of the tire sets used last
can be selected.
316
Online Edition for Part no. 01405B45E30 - VI/24
English 
