I recently installed an Avin Avant 4 in my X. I had factory nav, so running a cable from front to back was necessary. It was fairly time consuming, but not terribly difficult. Found a good DIY on Youtube. They said to cut the connector off the cable near the end that wen to the trunk. I initially thought that a dumb idea, then I tried running it with the connector on. I cut it off. It adds a little work because you have to reconnect all those wires, but it saves in how much of the interior you don't have to pull out.