Page 37 of the Power Supply, Ground & Circuit Elements section of the 2004 service manual (pg.pdf for those of you who have the digital copy). Bottom of the page is apparently a box with fuses in it, one of which is Fuse #37 which supplies power to part of the audio & nav systems. Do you know where these fuses are physically located in the coupe? Is it back "behind" the battery?

 

Fuses are near the battery and next to the dead pedal