BMW 8 Coupe Series, Руководство пользователя

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3. "General settings"
4. "Snow chains"
5. "Snow chains fitted"
The rear-wheel steering is switched on again au‐
tomatically when the permitted maximum speed
for snow chains of 50 km/h, 30 mph, is reached.
Tyre Pressure Monitor
TPM
Principle
The system monitors the tyre inflation pressure
in the four fitted tyres. The system warns if the
tyre inflation pressure in one or more tyres has
fallen.
General
Sensors in the tyre valves measure the tyre infla‐
tion pressure and tyre temperature.
With the tyre settings in iDrive, the system can
display the specified pressures automatically and
compare them with the current tyre inflation
pressures.
If tyres are fitted which are not listed on the tyre
inflation pressure labels in the vehicle, see
page
306 , for example tyres with special appro‐
val, the system must be actively reset. The cur‐
rent tyre inflation pressures are then accepted as
the specified values.
To operate the system, also please comply with
the other information and notes in the chapter
Tyre inflation pressure, see page
306 .
Safety note
WARNING
The display showing the specified tyre inflation
pressures does not replace the tyre inflation
pressure information on the vehicle. If incorrect
data has been entered into the tyre settings,
the specified tyre inflation pressures will also be
incorrect. As a result, reliable signalling of a loss
of tyre inflation pressure can no longer be guar‐
anteed. There is a danger of injury and damage
to property. Make sure that the tyre sizes of the
fitted tyres are entered correctly and that they
match the specifications on the tyres and the
tyre inflation pressure information.
Operating requirements
The following requirements must be met for the
system, otherwise reliable signalling of a loss of
tyre inflation pressure is not ensured:
▷ After every tyre or wheel change, the correct
specifications for the fitted tyres must be en‐
tered in the tyre settings, see page
317 .
▷ In the case of tyres with special approval:
▷ After every tyre or wheel change, a reset
must be carried out with the correct tyre
inflation pressure.
▷ A reset must be carried out after the tyre
inflation pressure has been adjusted to a
new value.
▷ Wheels with TPM wheel electronics.
Tyre settings
General
The tyre sizes of the fitted tyres can be found in
the tyre inflation pressure information, see
page
306 , or directly on the tyres.
The tyre specifications do not have to be re-en‐
tered if the tyre inflation pressure is corrected.
For summer and winter tyres, the last tyre speci‐
fications entered in each case are saved. This
means that the settings of the sets of tyres last
used can be selected after a tyre or wheel
change.
Calling up the menu
Via iDrive:
1. "CAR"
Seite 317
Wheels and tyres
MOBILITY
317
Online Edition for Part no. xxx - VI/18