Calibration for vacuum pressure measurement
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.
Seal stop cock (2) in direction of arrow.
Release lock nut on controller (1).
Carry out pressure adjustment in accordance with BMW diagnosis instruction.
Secure controller (1) hand-tight against turning.
Open stop cock (2) again.