E60, E61, E63, E64 - Instrument Cluster System Overview
WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Instrument Cluster System Inputs/Outputs Diagram
Courtesy of BMW OF NORTH AMERICA, INC.
Fig 2: Legend For Instrument Cluster System Inputs/Outputs
Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Instrument Cluster System Circuit Diagram
Courtesy of BMW OF NORTH AMERICA, INC.
Fig 4: Legend For Instrument Cluster System Circuit Diagram