Does anyone know what is entailed in removing the Sirius receiver in a 2005 530I I know I can just disconnect the two plugs antenna and the most connector but when I do that I lost audio in the car.. Do I need to terminate the MOST connector... Reason I am asking is I am getting a new 535 and that dealer told me its the same part number on the sat receiver in that car... so I was hoping I could just have the dealer install it in the new one..