Hope members here have utilized their free complete (almost) factory E9 parts catalog, if not, then a great service is lost. Two Adobe pdf catalogs altogether, with one depicting all the parts and the other which lists the part numbers and their (W/N) availabilities. What is so great about this is the fact that parts illustrations are much larger and clearer than the standard online BMW parts catalog and one can explode the parts illustrations without losing any clarity. Only caveat is not every part # is listed, but rather just what W/N has in stock. One can easily look up the part numbers (if unlisted) through realoem or other similar online BMW parts catalogs. One should send these pdf's to one's desktop for easier access.
WallothNesch parts catalog/price list tandem downloads
WallothNesch parts catalog/price list tandem downloads