Hotel parking valet left seat heating ON which drained the battery. Then they tried to jump start the car and crossed the cables. It blown the main fuse on the positive battery contact (120A, costs $60) and another fuse marked as radio. After I replaced these 2 fuses, everything works fine except that there is no sound at all from audio system. Navigation screen works, shows stations or disks but no sound. I suspect that it can be another fuse. Is there audio amp fuse in FX? Thanks. (I spent almost 6 hours yesterday cleaning this mess. What a pain.)