Hi All, Yesterday my car was working with no problem what so ever, however this morning I am having issues with the steering wheel controls, specifically the volume control, track skip buttons, bluetooth button, and the end call button. When I try and change the volume via these buttons...

Hi guys, I have just bought and installed a new quad core head unit. It is all working except the steering wheel controls. I have done as instructed in the manual but cannot get them to programme or work. Has anyone else managed to get them to work. I have an 08 Astra SRI. Thanks