See also:

Tire identification marks
Knowledge of the labeling on the side of the tire makes it easier to identify and choose the right tires. Tire size Speed code letter Q = up to 100 mph or 160 km/h T = up to 118 mph or 190 km/ ...

Tire inflation pressures X5 xDrive50i with three rows of seats
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Air volume, manual
You can vary the air volume by pressing on the corresponding side. You can reactivate the automatic mode for the air flow rate with the AUTO button. ...