So, we get the question ALL the time about how to know when a BMW is in the "on" position. Or, the position it need to be in to be able to flash. Here is the sure fire way to know if it is in the on position or not.
-Your car is in the ON position when your fuel gauge needle reads a level.
-Your car is in the OFF or ACCESSORIES position if your fuel gauge needle is on zero.
Simply press your start button without your foot on the brake or clutch until you see the needle of the fuel gauge read something. The only way this can be wrong is if you are out of gas. Haha. ;)
Enjoy your AP!!!!!