Finally got the car back from the dealership today after 3 days in the shop! Just past the 5-day return period.
They were able to replace the heated seat mat, seatback fabric, and door trim under warranty. The heated seat works perfectly now.
They would not repair a small cut in the trunk seal though, attributing it to "external factors". It probably got cut when removing or reinstalling the cargo cover.
Spent a bunch of time trying to program the Homelink unsuccessfully. The yellow LED flashes as soon as I press any button so have not gotten past the erase all programming stage. Will try again tomorrow.