Hello, I am new to the forum. I purchased 2017 SE 6MT 3 weeks ago. Purchased as new and now have 2800 miles. Couple of days ago I started noticing noise from rear drum, almost sound like metal to metal. How could this be possible? I plan on taking it in for warranty but want to know if anyone else had similar issue. Also, my AC doesn't smell too good. It smells moldy. Thanks in advance.