I use a combo of Bentley and TIS data. TIS is a "dealer" computer based reference listing procedures and how-to instructions including diagrams. The CD is available through several sources including Ebay. Beware of legal issues with free downloading. The Haynes are usually wrong about so many things when you need help. But for basic stuff they may work. I got my used Bentley for $25 shipped from a member here who sold his car. Well worth that price, the thing is like a phonebook in size. I've used it to look up plenty of stuff so yeah, I'd say it's worthy.
Anything made can be made Better