You want to take off the door panel? For what purpose? May I ask - out of curiosity. The easiest way to get a manual for it is to convince Tesla that you are a Massachusetts resident and are entitled to have a repair manual for the vehicle. Otherwise, speak to a tech in service when you are at the service center and just ask him straight up.... Even though it seems impossible, that they will share that information with you, they may. Just be polite and respectful and they may oblige you.