We are going car shopping today and we are for the first time, trading in an old car for a new one. I know not to tell them we are going to trade it in until we agree on the price. Once we do start talking about trading it in, do they take it to the service department and have it checked out? There is a brake issue, thus the reason for a new car. Do we tell them or is that the chance they take. I am not sure of the procedure. Any help?