Checking variable turbine geometry
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
The adjusting lever must adjust between minimum and maximum activation by 35° to 45° angle of rotation. Adjustment must take place rapidly.