mercedes/s-class/2006-2013

Audio problem

So a week ago my sound went out. Theres no sound at all displays "device not available" gps works 

I took it for diagnostics 2 positions came up as open 

Mechanic told me to replace the sattelite tuner 

I did bypass it with optic fiber loop cause i read that u can and still no sound 

I will attach the diagnostic results maybe u guys can help ! 1of2

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