Hi,
Thanks everybody for the links, very interesting. Sadly, only two of ALL the sites liked above has any Infiniti at all. And only one covers M35 owners like me, since this car is on the market since 2006 only.
BUT, you can find below the complete service manuals for ALL Nissans and ALL Infinitis. Even the new 2008 G37s coupe is there. With that you can dismantle all your dashboard, or even your entire car, but you have to also download the index for the conventions, to how to read diagrams, list of tools, etc.
http://www.nicoclub.com/FSM/
Keep in mind that this was written for a factory trained technician, so you won't find any tips there for us amateurs. It is a funny reading sometimes. When something does not pass a wiring test, they simply say: replace the (thing). No matter what that thing cost...displays, cd changers, motors, seats. Every chapter ends with: reverse the order to mount. If the part does not work, test the cables. If it still not work, replace it. Simple as that.
Well, me, on the other hand, if I screw up the display while dismantling the dash, you bet I will poke around every little part of it to make it come to life again! lol.
That's why I am also considering ordering the 12vresource.com cd-rom, but I wonder if that is not just a collection of the relevant parts of the service manuals. Does it also have tips and tricks (like other sites linked above do, but for other makes), or is it just professional diagrams like a service manual? Anybody?