Ok. I have plodded on and converted my car from sinle to duel din and installed RNS-E. All installed ok and all was going well. Not being familiar with the system I started having a bit play and its now playing up. I have a mute symbol showing at the bottom of the screen which disappears every so often momentarily but comes straight back on. I cant get any sound from the radio or CD, although Sat Nav is ok. The Red DIS keeps flashing between PHONE and the radio station. I dont have a phone installed though the previous owner must have done as there is a Sony Ericsson box of some sort behind the cente console. Now that I have swapped out my previous Concert HU I dont have any music and its really going to do my head in I'm sure. When testing the RNS-E a few days ago the mute symbol was showing after a while although I didn't have the ignition on so didn't notice the PHONE flashing. Any idea's????