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Door windows crack icy climates?

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Rear driver side window has cracks. Seems to be cracked on the inside. Outside is smooth.

Only thing I can think of is it did get sticky during an icy period this winter.

There is no evidence of any physical damage caused by an outside object.

Factory defect?

Will warranty cover?
 
If the rear window "up" limit were off, or the window manually raised all the way while the door was open, and then shut, particularly while freezing, added strain could be put on the window. Since it is outside of the track in this extended position, it might crack when the door is closed since it will be bent out. In fact, on my 2020 S, the top of the window will hit and not clear the chrome exterior roof trim and could definitely break when the door is closed firmly.