2012 EOS Executive. I have a loud knocking noise coming from the area of the rear passenger side roof mechanisms. (i'm not real good at localizing noises) It is very noticeable at low speeds around the neighborhood. i do not hear any knock with the roof retracted. Yes, i know, wind noise and such but i believe that if this was coming from a body or door panel, i would even hear it at low speed. Are there any known issues of things coming loose, or is there an adjustment in panel positions i could try?