The 5 door only comes in the S model with the 17" wheels where I am located. yeah I had a full load of people 2 in back and one in the front passenger seat. It was only over a pot hole, speed bump, or left turn? Whatever it is, it is REAL loud and sounds REAL bad! I have it at my dealership now, they had me drive it around with a couple of mechanics in the back so they could hear it. Once they did hear it one said "ooh, try not to do that again" which I am guessing isn't good. They thought it was going to be an easy fix and told me to hang around, like something loose or something. But they could not find anything. so now they have to rip the whole rear right off to find out what it is. I will post their results when I get them.
My dad and I where thinking afterwards and thought it might be that the caliper is loose or something and it is scraping on the rotor or binding. At any rate... it sux hard ~:-(