323i

I have a 2000 BMW 323i. Recently, the hood has started popping open when I drive on the highway. It doesn't open all the way because the hook prevents that, but it open and goes up and down as I drive, scaring the heck out of me. It usually happens when I go above 60 MPH and windy days makes...

...What else do I need to hook em up? what wiring kit do I need? Which dash kit do I need? What do I need to be able to play my iPhone 3G? Thanks in advance! -Hamby

It's a 4 door if that makes a difference.