I have just bought a B Max Titanium and am puzzled by the radio. I have always listened to my radio on long wave because it gives far better reception and sound quality than FM. The radio in this car does not have long wave so I was interested to see how the DAB side sounded. I only listen to Radio 4 so tried to search for it. During this process I came upon things I am unformiliar with. What is FM-AST and AM-AST and how does DAB1 differ from DAB2? I enitiated a search on DAB1 but the radio turned itself off before it had stopped searching. I repeated the search but there is no BBC Radio 4 dispite the information on the BBC web page saying they transmit on DAB. Radio switched itself off again. How do I get Radio 4 and how do I stop the radio switching its of off.