Just found this site, quite helpful, for example
Clutch Does not Disengage. https://www.zf.com/brands/en_de/sach...disengage.html
https://www.zf.com/brands/en_de/sach..._sx/index.html
Great find. Thanks.
A Bimmer Nut '99 Z3, '06 330cicm zhp, '69 r60, Owner/Operator of www.Bimmer.info and www.BimmerNut.com