Okay so I have been following this thread with interest and even more now that I wiil be buying a new car this week. I am going to be buying a new Kia Optima. Originally I was going to get the Optima without the 7" nav. I was then going to use this kit, http://www.ebay.com/itm/270759647938...2649#vi-ilComp, to move the stock radio and put in place a spot for 7" Liliput lcd. This causes some logisitical issues as I have to figure out where to relocated the cigarate, line in, and usb in ports (probably the center console).
However, I can also get the Optima with the optional 7" touchscreen navigation unit. This is a stock OEM unit. My question about going this way, is how to get video from the phone to the oem unit. To my knolwedge, must OEM in dash gps touchscreens do not have an auxiliary in plug (except for *maybe* the backup camera rca). So, is your system only for use with OEM units that have optional aux inputs?