When I got in my '04 VW Jetta the other day, the car wouldn't start and the immobilizer light was blinking. I tried charging the battery, pulling the terminals from the battery, and leaving the key turned to "on" for a half hour (as many people online suggested). Nothing worked, on all three keys. I figured I'd take it to the dealer this weekend.
Then I got in my car today to grab something and put my key in on a whim. The immobilizer light didn't come on, so I started it and it ran just like normal. I don't understand how this happened, but we're planning a road trip in three weeks and I'd very much not like to be stuck at a gas station in the Tennessee mountains if this happens again.
So what happened to trigger the immobilizer? Why wouldn't it turn off? And is it likely to happen again?
EDIT: Well, the immobilizer is on again. After stopping at a Speedway to get gas, the car won't turn on.