See also:

Tire inflation pressures X5 xDrive50i with two rows of seats
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Closing
1. Fit the fuel cap and turn it clockwise until you clearly hear a click. 2. Close the fuel filler flap. Do not pinch the retaining strap Do not pinch the retaining strap attached to the cap; ...

FTM Flat Tire Monitor
The concept The system does not measure the actual inflation pressure in the tires. It detects a pressure loss in a tire by comparing the rotational speeds of the individual wheels while moving ...