Hello Appologizes if this has been answered before, but a search didn't turn up much useful infromation. In the Model S design studio, for the parking sensors there is the following text: "four zone front and rear parking sensors" together with a bunch of pictures showing two zones at the front and two at the back. Does this means there are only two sensors at the front and two at the back? I don't think I've ever seen a car with only two for each. Even the saab I had 10 years ago had 4 in the back. I took a look at the parking lot outside work this morning and every car with sensors had 4 in the back. For those with sensors in the front, they were 4 or 6 for a total of 8 or 10. So 4 in total for the MS seems just strange.