I got hit with this issue recently which happened shortly after a software update. My VIN is in the low 6000s.
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Vehicle support said it was a 12V battery issue but was perplexed at all the error messages from my car. He had never seen anything like it before. It was Sunday afternoon and apparently, no one in diagnostics was working at that time either. As we were talking, the car went offline so he had me open the door to see if the car would come back online. That turned out to be a bad idea since the window normally drops a little when opening the door and now I had a door with the window fully up that I couldn't close without damaging the chrome trim and window.
For the next hour, I tried opening the tow eye cover. The manual said to push firmly on the upper right corner until it pops open and I've seen a video of someone doing it one handed on youtube but mine wouldn't budge. If I pushed any harder, I'm certain I would've bent or snapped it in half. I ended up using a plastic pry tool on the bottom left of the cover to get it open. I'd advise everyone to have their delivery specialist demonstrate it for you when you pick up your car to make sure yours isn't like mine.
Once the cover was open, I got the frunk to open by applying 12V using a jump starter to the terminal wires inside the tow eye cavity, then removed the plastic cover and another plastic piece to get access to the 12V battery. After connecting the starter to the battery, I was able to lower the window and close the door.
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I hooked up a trickle charger (12V 6A) overnight and got it to 25% when I checked on it in the morning. There were some new error messages: Airbag needs service; Parking brake needs service. They couldn't get a mobile tech out in a timely manner so we decided it'd be best to get it towed to the service center so I could get a loaner for the time being as the car was inoperable.
When the tow truck arrived, we tried putting it into transport mode but the car wouldn't let us (button was greyed out) so the tow truck driver put skates on the rear wheels and pulled the car onto the truck from the back.
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