9autos.com

There's a variety of flavors of in-car networking standards that corral the large number of embedded computers and nodes present in the modern automobile. BMW Research and Technology, an R&D division of BMW, has found Internet Protocol up to the tasks that the other standards currently perform.......

How's this - you pay a nearly ten percent premium to get a factory navigation system in your new whatever, and when it's replacement time, that very same nav system will cost you again, whacking 1% off the car's resale price. It makes perfect sense if you try to use some of the integrated nav setups......