S4

That's true. I used to have a CarPC in my old GTI and when it got cold (even above 0F) touchscreen would not work right.

Audi wiring is weird. I had to connect red and yellow to + in order for it power up but that is giving it constant 12V so it won't shut down when key is off/out. At any rate, I should be able to get into system setting with just power cables hooked up, right? If I hold "MENU" and "MAP" buttons I can get to screen brightness setting, then when I click the go back arrow I end up in system settings but everything is disabled. Same thing when it got powered up the first time, I could not select any languages or any other options it was prompting for. Also, navi setting are disabled even though

Just picked up F90BT on eBay and won't do full install for a couple of weeks but I just want to make sure the unit works before it's too late to return it. So all I want to do do is see if it will power up at all. What is the minimum needed? I've connected red and black and I'm showing constant 12V flowing but unit won't power up. This is on 2004 Audi S4. Any suggestions? Thanks

If anyone else is looking for logo here's a site that has almost all manufacturers in vector format