Will I be able to get a back up camera in my amg after market? I read here that there will be a plug in nav available. Will there be a reasonably priced option to get a back up cam without getting the multimedia package? I honestly don't care enough for the p1 or multimedia. Rather spend the money on rims calipers pano roof paint job sports exhaust, but I know that I will need a back up camera. My family will all be driving sometimes so i know It would come in handy. Does any one firmly believe an affordable aftermarket backup cam can be had that will work on the same screen. Or maybe mb will offer it as a stand alone option like the blind spot monitors for $550(totally worth it).