is it possible to install the navigationunit with dvd and so onby itself... i did not buy it OEM and had kinka changed my mind about it.

 

Not really, unless you go with an aftermarket unit. It would cost well over the $2,000 to install the factory nav unit. The factory nav connects to the radio, speedometer, odometer, running lights, it has a different dash and has two antennas in the rear windows, thats just a few things. Do a search, this has been brought up before.