This Model 3 was delivered in December 2018!
It developed a crack in the rear window from cold temperature?
“Seeking help, my MR 3 is 7 days old (NJ) and developed a crack on the underside of the rear glass along the defroster element. It has been cold and I have only opened the trunk twice but have run the rear defrost. Anyone else have this issue and I assume it is under warranty?”
MR3 probably stands for Mid-range since it was delivered in December 2018.
Still as of today, this is the kind of build quality we are getting. Tesla has to be cutting corners on cheap glass.