I think #1 is for a fully loaded van with JBL, nav, etc. It looks like you will need #2 to retain your steering wheel controls. I'm not sure what you would use #3 for. I'm unclear on exactly what inputs the head unit has. The description says, "inputs: rear USB port, rear-view camera input, rear 3.5mm A/V input." On the back, though, the only 3.5mm input I see says, "MIC" (which comes with it), so I don't think it supports the option of a second camera, if that was your intent. You will need something like #4, if you don't want to have a dangling cable coming from under the dash. It looks like it comes with a female-ended USB, so you could just use that. The one you selected appears to be a 3.5mm AND USB port. That would be nice if you happened to be able to fit it in place of the existing AUX IN (assuming your '07 has the same as my '06) port. Although, it might be too big for a totally seamless fit. #5 is an interesting one... Technically speaking, installing that is a violation of many State laws and could (definitely won't, but "could") cause you to fail a State vehicle inspection and is probably a violation of some Federal law too. You're not allowed to "use" a screen in front of the driver while moving, but, obviously, that's a grey area for radio touch screens and whatnot. Yes, when plugging in your phone to a USB outlet, it will charge your phone. The USB standard was actually originally designed fundamentally to provide power external devices.
