Hi Dwight, I visited that page prior to posting - they have manuals from 2004-present - I didn't see an archive or anything else for pre-2003 modelsMost owners manuals are posted for download at the BMWUSA web site:
On the Z4, they have a manual for the DIFFERENCE between the regular line and the M series and then you need to download the manual for the regular Z4s to fill in the rest of the information.
I would guess the Z3s would be similar.
George, I checked out diplodocs.com. At first glance it seems they do have the manual, however, once you click the download link, it just pushes to another directory-type page. Thanks anyway