54 34 342 Removing and installing/replacing both roof frame center gaskets
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2018 BMW M6, 2018 BMW 650i xDrive, 2018 BMW 650i, 2018 BMW 640i xDrive, and 2018 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.
This operation is described in section on:
Removing and installing ROOF FRAME GASKET left and right.