@huebleu
[highlight]The blinking CNG indication lights represents that all CNG cylinders are totally full and there is an up to mark CNG pressure that fills all the cylinders to the max.
Whenever CNG filled to the maximum point these lights will blink for atleast 5 kms.[/highlight]
There is nothing to worry about this.
@mesmerizer
I also faced this issue. The problem here is with the nozzel fitting. This is true for some of the CNG PUMPS. Try to change the CNG filling pump, u might not hear that creepy sound.