tell them that if they want to argue with you about it you know your rights. The moss magnuson act was created to prevent this. What it does is means that the dealership would have to prove to you that you are responsible for the issue at hand. most times just asking if they know what the moss magnuson act is and tell them you are familiar with it and if they would like to violate your rights as a consumer and paying customer you would like to speak to the owner of the dealership. or regional manager. escalate the issue. you replacing a speaker is not going to fuck the window up