was looking around on E46F when I saw this:



I read some more of the thread and then I realized HEY, I have that but I don't have NAV... wait is my car prewired?



Then I did a little more searching and realized the 'Shark Fin' on my roof is actually the antenna for my bluetooth, I always assumed the original owner ordered it for the look since the car didnt have NAV. I also until now assumed that the antenna was for the NAV system.

So... maybe one day I will get around to a retrofit, not gonna happen anytime soon but its nice to know that its prewired