Aftermarket Nav unit?

[maz]

Klaus,

I have an '04 without nav and was told by the dealer that i could not install the factory one because the wiring harness is differant with the factory nav as comparewd to one without the factory nav system.

I would sure love to change out my 6 disk unit and slap a factory nav system in if there was really no work to it.

Your thoughts and comments are greatly appreciated.

MAZ