[Joost99]

Can't find settings that change something to the amplifiers or sound. I tried the normal reset in the settings menu and the reset in the engineering menu. That's a hard reset right, but maybe that unconnecting the battery does something more.. I will try that. I also tried the firmware update for the second time, but now my maps are gone haha, I will have to do the maps update again.

 

[Joost99]

I got the hissing sound from the Bose speaker on the passenger side after updating from 14.10.0 to 17.07.55.
Multiple factory resets via the engineering menu and leaving the Giulietta closed for multiple hours didn't change a thing.

I've seen this problem a few times on these forums, but does anyone know the cause or even better, a solution?