Dashboard lit up like a christmas tree, gave the brake error - speed limited, became undrivable. It's my wife's car, so I had her park it and I called the dealer... "oh we are booked solid, we can get you in to take a look at it in three weeks, and no, we can't give you a loaner"
I politely lost my shit.
Did some research here, and limped the damn thing home and slapped it on the battery charger and that took care of it, but now the battery won't charge or hold a charge. I'm starting to wonder if the last software update caused an issue. I'm still going to have it towed to the dealer and let them F with it.