Maximum irregularity of floor surface

WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. However, it is still accessible from the selected car via links, so may be relevant.

Floor surface - adjusting device ≤ 1 mm
Floor surface - vehicle ≤ 10 mm

Fig 1: Identifying Floor Surface Irregularities
Courtesy of BMW OF NORTH AMERICA, INC.