95 pages to download from wayback machine. Central Body Electronics (ZKE III) Model: E38, E39 and E53
Production: From Start of Production
After completion of this module you will be able to:
• Understand the functions and features of ZKE III
• Understand the differences in ZKE features between vehicles
• Identify and locate ZKE III system components
• Diagnose concerns on the ZKE III system
https://ia801005.us.archive.org/11/i...0ZKE%20III.pdf