Cause when battery weak, and you switch to ON position, it will have "DUNG" sound.
When you change new battery, and switch to ON position, if I remember correctly, will gave the "DUNG" sound.
So, if it's true, it could be something "reset"?
But it could also be battery level low, since some of you mentioned leaving the key in the car (I'm not sure if it will go to ECONOMY MODE this way) and especially using the radio? Thus, when you try to start the car, the battery level is low?
I don't know


Need to understand the Lion language.
