Dear Volvo-Feunde, there is an audio part HU-801 in my S80. For some time now the lighting of the radio is off. At the cold start always. If I’m lucky it starts to flicker after half an hour of driving and is then ok again. But can stay away even the whole day. The fatale is not only that I can not recognize the transmitters, but that the steering wheel control for the radio does not work (phone control funzt) and above all that with the Rü The Reversing Aid is not active. I notice when driving out of the garage that the radio does not mute and of course no display is visible on the radio display. My friend has looked at the problem and wants to change the radio. For limp 600 €!! Do you have another idea? I have looked for the plug assignment once, but only found one for HU-850. Does someone know the electrical connection in the fault that occurs with me? Somewhere have I also read in a similar case of chip soldering. Maybe you know more. Another related question: If I already develop the radio, I could also attach an MP3/USB connection. Found something there at yatour. But there I read: “Don’t go together with Navi!”. Does anyone know a solution that keeps me navigating? Would I be happy about your help. iksul