Here are the links for the broken tab. I have already emailed the pics to Fanatec and hopefully they email back soon. The driver is for the pc and the first thing you're suppose to install before connecting the wheel. The name of the fil is PW_32_driver_104 if that helps any. I can't get past trying to install that. I don't know if that's just the driver or FW or if I download the FW after or what. I'm not the most pc savvy, so I really don't understand all of what you said. From "C root" I'm getting take it off off the desktop and put it somewhere in the C drive. Looks like I need to spend some time on the google machine.
Link to images:
http://www.mediafire.com/i/?bm6mw0n7ck3ayx4
http://www.mediafire.com/i/?gh90zi4ywggy0aa
I think that might be one of the taps that snaps the main faceplate in place, i will open up mine and have a look tonight. I dont think you have too much to worry about but is is annoying to get something new that has a defect.
P.s, did you prise of the metal badge only or the circular plastic face plate it is attached to