Engineering Mode / Head Unit Hiss
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2007 CLS 550
Engineering Mode / Head Unit Hiss
I have an 07 CLS 550 W219 and I got into the engineering mode on the head unit last night in order to try and access the hidden menu. I was unsuccessful in getting the hidden menu, however, now when the head unit is powered off, I am getting a slight hiss or feedback sound coming from the car speakers.
Its quite annoying. Does anyone know how to rid of this hiss / feedback sound after powering down the head unit?
Thanks!
Its quite annoying. Does anyone know how to rid of this hiss / feedback sound after powering down the head unit?
Thanks!