A:AnswerYou need a special interface to have a camera hooked up to the factory screen. NavTV.com carries a lot of the interfaces. For your vehicle the interface is about $599. Another option would be to replace the mirror with one that has a display in it for the camera. Check what features are currently in your mirror because you may lose them (microphones for hands free phone calls, compass, garage door opener buttons, etc.)
Here's a link to the interface for your car: https://navtv.com/products/NTV-KIT725/bmw09n-dynamic-kit.html
A:AnswerDifferent cars need different modules to interface with. Since you only said BMW I can't give you specifics. The modules run a couple hundred dollars. Check out NavTV.com. You can put your type of vehicle in and then select Backup Camera interfaces to see what's available.
A:AnswerThe yellow end with the red wire goes to the camera input on your head unit. The purple wire with white stripe goes to the red wire on the yellow plug.
A:AnswerI don't think it's possible unless the Mustang has a front camera already. These are typically powered by the wiring for the reverse lights so they only function while in reverse.
A:AnswerI believe there's a blue loop wire that could have gotten cut or on your radio there's an option to have the image reversed might want to check those things out
