I'm sorry I didn't notice you weren't in the US.
The startek site has all the printed diagnostic manuals and the best wiring diagrams that exist with links to all kinds of other info.
It reproduces WIS and extends upon it. For late model cars it is about all the info there is without a Star Tester.
But, its existance is due to US legal action and I am pretty sure they will only take credit cards with US billing addresses.
Bosch Master, ASE Master, L1
33 years MB technician