Does anyone know where I can download the 355 workshop and parts manuals?
You could try using search in the 355 section in future You would have come up very easily with http://ferrarichat.com/forum/showthread.php?t=124127&highlight=workshop+manual
Actually, I did do the search and went to www.the355.com and was able to view the manual but was not able to download them. Henceforth the request.