Shane_Damien

So I recently bought a used Mercedes c350 with the harman kardon system and nav system. But no matter what I do with the logic system the sound does not come from any of the speakers except the one on the dashboard above the nav unit. It is the only one that works and I think it’s because the previous owner had a subwoofer hooked up to the trunk(copper ish wire sticking out of liner in trunk) and when I check the amp some wires seem to have been cut and re connected to the subwoofers wire. I do not know if that is the problem as I can’t find anywhere else where only the speaker on the dash works. Usually people say all speakers don’t work but I just have that singular one working. So I would like to know if there is any fixes you guys would know of.