VW Beetle manufacture in Hannover und Ingolstadt?‏

Ladies and Gentlemen,
According to orientation of Susanne Wiersch I'm addressing you directly.
I need information about the VW Beetle production in the following factories:
Hannover from 1974 to 1975
Ingolstadt from 1965 to 1969
I would like to know why the VW Beetle was manufactured in this factories?
The number and types of the manufactured VW Beetles?
Was it made starting from CKD's? If yes who delivered this CKD's?
Best regards
Alexander Gromow
a.gromow@hotmail.com