I do not have power to the Bose amplifier in the trunk of my 05 CL65 AMG. I have been getting the error message “system unavailable” and when I bypass the amplifier with a fiber optic loop everything works as it should and no error message, except of course no sound. I checked the power cable coming into the amplifier and found there was no power. I have checked every fuse in the 4 fuse boxes, 3 under the hood and one below the rear seat on the passenger side and there are no blown fuses. Am I missing one of the fuse boxes? Any help is greatly appreciated. Thanks