Took ours in for similar noise, rattle in what sounded like passenger side of cargo area. I was told they took apart a lot of the plastic panels and just made sure everything was tight and added some felt tape to get rid of the rattle. Have only had it back since Wednesday, but so far, so good. He didn't say anything about adjusting any locking mechanism, striker, etc.. but I suppose that could have fallen under "made sure everything was tight.."
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