Hi, I have a very annoying problem with my CD30 MP3 stereo in my Vauxhall zafira 2014. When the engine is off, all the buttons on the CD30 work fine, and the audio works as normal. However, when i turn the engine on, after a few seconds, the display remains on but the audio cuts out and all the buttons become unresponsive. When i then turn the engine back off, after a few seconds, the audio comes back on and the buttons all start working again. I have tried removing the fuse for the infotainment system for 15 minutes to reset the head unit however the problem persists. If anyone could advice me on what to do next i would be most grateful.