radio cd,radio cassette works but no sound from speakers everything else works on 2000 Mercedes-Benz ML430

as i said cd,radio,cassette works but no sound from speakers wondering if amp is out or could there be another problem

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3 answers
could be alot of issues seek a stero shop in your area to diag and get est. could be amp or module
could be a broken wire or a inoperative amplifier.
check too see if you have a blown fuse and if amp. is getting power.