I don't know if anybody else is even interested in this lol but I'm pretty sure I'm on to something. Android phones (I have an LG G3) mini usb port is capable of outputting a digital signal (think hdmi) and wouldn't work with the cars analog composite inputs. So I think an MHL adapter would be required. I think it would go something like this: LG G3 - mini usb to hdmi cable - mhl converter - rca cable - rca input in car.
ViewHD HDMI to AV Composite Video Converter (VHD-MH2A): Amazon.ca: Electronics
Would also need one of these:
http://www.amazon.ca/gp/product/B005...A2SUJMBSXWX5S4