I think it´s the taco sensor or some like that

I had the same problem

No big cost to change/adjust

hi,

have you recently changed the beosound 9000 mounting position horizontal/vertical/flat?

if so it could be simply adjusting the cd clamper configuration at the back of the unit to the right position

jason

If what Jason says doesn't help then it is the black plastic clamper arm which is slightly bent and touches the spinning CD and you hear a scraping sound. It needs replacement (p/n 2854003),  possibly, though less likely, only an adjustment.

Not a big deal at all, but best to get both done by your dealer ...