Mercedes c200 cgi w204 2010 year model Audio problem

Only in the morning, at first start of the ignition, I can use radio and any other audio like CD or bluetooth as well. But after I shut off engine or turn off radio and turn back on any one, it makes this sound and no audio played at all. I went to near workshop and they said it might be AMP and they can get 2nd hand will cost 600 Australia dollar. Just want to make sure it is worth it or make sure it is AMP problem.