See also:

General information
Instructions for voice activation system. To have the available spoken instructions read out loud: ›Voice commands‹ ...

The concept
The tire inflation pressure is measured in the four mounted tires. The system notifies you if there is a significant loss of pressure in one or more tires. ...

Tire inflation pressure values over 100 mph/160 km/h
740i, 740Li, 750i, 750Li Without high-speed tuning feature 760i, 760Li Without high-speed tuning feature With high-speed tuning feature 750i xDrive, 750Li xDrive Without high-speed tun ...