VSW video switch
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
The video switch is the central component of the system. It supplies the camera with energy and transforms the CVBS signal of the camera into an LVDS signal. Depending on requirements, either the camera image or the image of the head unit is transferred to the CID.