Factory shop manuals are available in several volumes (body, engine, electrical, AC, transmission, maintenance, ...) in hardcopy or all together except the transmission and volume in poor quality scans on CD. Phil can probably get you the FSM on CD. Keep an eye on the parts forum and eBay for hardcopy manuals. If you don't have a PC in your garage, driveway or wherever you work on your car, the Haynes manual is pretty good.

That white plastic part looks like a rear swaybar link.

Sixto
87 300D