I hard wired my c-350 from the side of the glove box. This was not easy and I could not get to the back of 12v outlet in the glove box. I found two cables running on the front right pillar (Red and brown) I test for 12v. I tapped in to them and have power. The problem is that it is not swichted. Will this drain my battery? If so do I go back and remove the 3m clips from the wire? I do not want to mess up my car. Thanks for the help.