BMW Z4 ROADSTER Owner's Manual page 282

MOBILITY
Information on the wheel size and rim offset is
located on the inside of the wheel.
The list can also include wheel/tire sizes that
are only suitable for certain models.
Information on wheels and tires approved for
the vehicle can be requested from an author-
ized service center or another qualified service
center or repair shop.
Follow the snow chain manufacturer's instruc-
tions.
Do not initialize the flat tire monitor after
mounting snow chains, as doing so may result
in incorrect readings.
Do not reset the Tire Pressure Monitor after
mounting snow chains, as doing so may result
in incorrect readings.
When driving with snow chains, activate the
Dynamic Traction Control briefly to optimize
the drive power.
Maximum speed with snow chains
Do not exceed a speed of 30 mph/50 km/h
when using snow chains.
Tire pressure monitor
Principle
The Tire Pressure Monitor monitors the tire
pressure and issues a warning if the tire pres-
sure has dropped.
General information
Sensors in the tire valves measure the tire in-
flation pressure and tire temperature.
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.
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
282
Wheels and tires
Online Edition for Part no. 01405A88B63 - VI/23
will then take over the actual tire inflation pres-
sures as the target pressures.
When operating the system, also note the in-
formation found in the Tire inflation pressure
chapter.
Additional information:
Tire inflation pressure, refer to page 268.
Safety information
Warning
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 damage to property.
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.
Functional requirements
The following prerequisites must be met for
the system; otherwise, reliable notification of a
tire pressure loss is not assured:
▷ 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.
Enter the information about the mounted
tires in the tire settings when the system
does not automatically detect the tires.
▷ The Tire Pressure Monitor does not acti-
vate until after driving for a few minutes:
▷ After a tire or wheel change.
▷ After a reset, for tires with special ap-
proval.
▷ After changing the tire setting.
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