Geometrical driving axis 1
WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
Is the angle bisector from the total rear-wheel toe.
Front-wheel measurements are taken in reference to this axis.