I JUST RECENTLY PURCHASE A ML 320 2003 ..WHEN I TURN ON THE RADIO... CD..... OR NAVIGATOR ...THERE IS NO SOUND AT ALL......EVEN A HUMMMMING SOUND IS NOTHING.........I DONT KNOW MUCH ON THIS... PLEASE HELP....... BUT THE STATION ON AM OR FM WORKS FINE.... NAVIGATION WORKS FINE TO..... JUST DONT HAVE A SOUND..... FUSES ARE GOOD AND ALSO CONNECTION ON THE BACK OF THE SYSTEM ARE GOOD ALSO. I CHECK THE AMPLIFIER ITS GOOD ALSO.....EVERY THING WORKS GOOD.... AM.. FM...NAVIGATOR...CD.... THEY ARE ALL FINE ...EXEPT NO SOUND AT ALL... NOT EVEN A HUMMMING SOUND...PLEASE HELP

 

are you using cd changer or just inserting the cd on the head unit (radio)?

 

I DON'T HAVE A CD CHANGER I JUST INSERTED IT TO THE UNIT AND PLAY IT........ YOU CAN SEE IT'S PLAYING BUT NO SOUND.....YOU CAN PUT IT ON DIFFERENT TRACK AND IT'S PLAY BUT NO SOUND TOO......I TRY THE CASSETE PLAYER TO AND SAME THING ...IT PLAY... BUT NO SOUND.....

 

i don't know what head unit you got but....

if it used to play cd before and cannot now, then try using a good original cd and not home burned one.

some head unit cannot play music cd but only navigation cd/dvd.

 

THAT'S NOT THE PROBLEM IS....THE PROBLEM IS......EVEN IF I PUT IT ON AM.... RADIO....OR I USE THE FM....RADIO.......STILL NO SOUND.....IT'S LIKE IT IS ON MUTE........

 

I have the same problem with the comand system, no sound at all. did you already solved the problem?

Jan