Toggle switch which controls navi and iPod video outputs.

  

I almost use rear-view mirror built-in display to look navigation map and iPod Video and Rearview monitor. But my display's video inputs are only two. Input 1 is for rear-view monitor which automatically switched on by shifting stick to reverse position.

So I use input 2 for navagation and iPod video

The toggle switch has three mode:
+ Navigation
+ iPod
+ iPod with interruption by navigation guidance