The handle contains two capacitive sensors. the ridges is capacitive sensor 2, which is used for locking the car. The other sensor is capacitive sensor 1 which runs the length of the grab handle you pull to open the car or when you place your hand imbetween it and the door. There is a a capacitive plate on the inside of the door. Thats how it works, you put your hand through the air gap between the door handle and the door and it unlocks, providing the key you have, is on you. Now that you have put something imbetween that area. The car thinks its getting a unlock signal all the time, but the key is not present, this will flatten the battery, so it turns off the sensors in the offending handle. This is why you are having problems with it, the handle supply has been taken away. The system is smart though, it will take into fact that snow, mud or dirt around the handles, but your modification, im afraid not.
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