Parked at the store today and saw what I thought was some spider web on the front left area of the glass roof on my 2015 with 224 miles. I went to brush it off and WTF! It's a crack! It's about 12 inches long and starts at the edge of the glass about 2 inches back from the front of it. It is on the driver's side.
I haven't driven on the freeway at all yet and haven't been behind any cars or trucks that may have thrown up a stone or object that might have hit it.
Taking it in Monday to the dealer for them to look at it.
I say glass defect or stress crack. Hopefully the dealer will agree with me. No chips or impact area can be found so we will see.