Morning Steve
I assume you have the hand books and are trying to find a repair manual. There are no Haynes manuals but there is the Bentley Manual which you may find for sale they tend to be expensive though.
However there are some superb websites you can use for free and download and print information as you need it or as I do sit the laptop on the bench and read from the screen.
(1) www.realoem.com If you aren't already aware this is an online BMW parts website, put the last 7 digits of your Vin Number into the search box and it will bring up your model then just search for your part it has small exploded drawings plus the important part number for replacement.
(2) www.newtis.info This is an online BMW Technical Information site the same as used by Dealers plenty of "how too's" and drawings as well as pictures
(3) www.pelicanparts.com This is a US site so the steering wheel will be on the wrong side but some well documented "how too's" with pictures at each stage. The only thing you won't find is anything on the Diesel engine the Yanks think Diesels go in lorrys.
Its frustrating that due to the different laws in the US they get all this information that BMW guard in Europe still good old Google gets over that issue.
Good Luck enjoy your X5
Dave