Adding NAVI to 2001 ML-320

[awaschka]

I just recently purchased a kit to add NAVI to my 2001 ML 320. I'm told it is a complete kit, is DVD rather than CD, and has the software with it. I have gotten conflicting information from e-bay, the web, and my dealer regarding installation of NAVI into an ML. One e-bay seller said that 2001 ML's required a splitter and several cables which, I presume are in this kit. I figured the splitter was for the antenna, since he also said that you had to add the antenna on the 2000 trucks. There are already two unused antenna connectors and one unused multi-pin connector under my passenger seat, tie-wrapped to the seat frame. One antenna cable is TNC and I'm guessing this is for the cell phone. Another looks is a small female connector like MCX, maybe. I figured that one for the GPS. A web site I found showed removing the console to get access to the vehicle speed and reverse indicator at the CAN bus on the connector on the front of the transmission selector. The e-bay seller says the car has to be version coded to get the NAVI to work. My dealer (parts) says its plug and play. I hope this "kit" has instructions. Barring that, is there a definitive source of information for this mod short of taking it all to the dealer and picking the car up when they are done?

Thanks,

Al