You must register, here in Europe the minimum payment is €7 + taxes and you have one hour to download all the PDFs you need. An hour is more than enough to download all the PDFs of one or several vehicles, it depends on you, the speed of your connection and your devices, mine go at the speed of light or a little faster.
I recommend you browse the web for a little learning about its use before paying for this service.
I used to have ELSA (free), but I prefer erWin because 1 it takes up less space on your device and 2 because the diagrams are fully updated.
Within the web, on this same page, you must set the language to English or German, both on the surface and in the search.