Any time I go to turn on the radio it cuts on for a few seconds showing the Mercedes logo and then it’ll cut it back off

Another thing to take note Is that I can hear the cd changer checking the cds but it won’t open up (the weird 6 cd fold out one) and I don’t know if that’s because the radio isn’t on or if that’s gone too

I’ve taken my trunk apart and unplugged my amp and tried it so see if there was any difference and there was, it cuts off faster when it’s not plugged in. I just want full go ahead before I blow 75 bucks on a new amp that ends up not being the problem

I just want my music 😭😂 Any help is appreciated