I also have found the CD manuals fantastic. Most valuable is that they contain all necessary manuals, including wiring diagrams, engine, A/C, chassis and the owners. A true wealth of information. I also prefer printing pages so I can make notes on the actual wiring diagram. Also very portable.
A convenient hint: make a bookmark in your browser on the page to select the car model/year. You can then use this link to bypass the introduction and disclaimer pages.
Use and enjoy.
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"