Manuals (Defender TD5)
It took quite some time to collect all the manuals but finally I suceeded in getting the most important documents.
So far, they were sufficient to solve even delicate problems (eg sudden change of color codes in electrical connections). They also helped me in attaching my TerraTrip rally computer to the odometer and so on.
A hardcopy of the manual is always with me on long tours. In addition, I have saved all the files to my tablet PC that is also with me at all time.