..I've always purchased a shop manual for all my vehicles. It's worth it's weight in gold when it comes to procedures and diagrams..how/why things work. Even if I don't do the work my self I read up and what procedure needs to be done and what to expect from the mechanic and always have a short conversation with whom ever is doing the work so they know..I know. And have "by the book" expectations. Has any body here purchased a shop manual from Nissan?? What would I expect to pay for it??