I don't think this one has anything to do with the battery. Mine did the same two winters ago, same situation. I reset it with the wheel turn method and it didn't reset right away. It took several hours. My battery was/is fine. My issue BoilerUp was the same. Pulled out of the parking lot at lunch. Car caught some ice and rear spun a bit. BAS/ESP light/ABS light came on and the spoiler went up. Felt stupid sitting in the bank drivethrough with the spoiler up! Spoiler would not go down even manually unless I shut the car off and then restarted it and put it down manually. Came back to the office and called the dealership set up appointment, went out after work and everything was fine? I wish I had an explanation for you, cancelled my trip to the dealership. I know a low battery can cause the ESP/BAS light to come on but I don't think that's the case here. I have an 05 LTD.