I have a on going batt drain problem which MD can not find.And no error messages point to a cause. I am trying to eliminate things and now looking at the alarm. Mine arms ok and indicators flash when set.The flashing led`s on top of door flash and i can set the alarm off and the siren sounds. The only thing i can not seem to understand is deactivating the tilt/interior sensor. I have read the manual and it says the led will light on the switch that has been pushed,mine do not light.I have tried with ignition on and off. Last night while trying again by chance i see that if the door is closed and the tilt/interior button is tried no led will light BUT if the door is open the led will light. I have just checked the manual and nothing is mentioned about this. Is this normal?