Hi, I have a 2004 Vauxhall Astra. Recently the vehicle would not start the issue was that the battery was flat. A mechanic has confirmed that the cause of this issue was that the radio was draining the battery. He has disconnected the radio and the battery has been fine since. Has anyone come across this issue? What do I need to do to get the radio fixed and working again? Any suggestions would be appreciated. Thanks Narinder