See also:

Tire inflation pressures X5 xDrive35i/X5 xDrive35d with two rows of seats
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Issuing a warning
If the vehicle begins leaving the lane and a lane marking has been detected, the steering wheel begins vibrating. If the turn signal is set before the lane is changed, a warning is not issued. ...

Tire condition
Inspect your tires frequently for tread wear, signs of damage and for foreign objects lodged in the tread. Check the tread depth. Minimum tread depthThe tread depth should not drop below 0.12 in/3 ...