Bury
I also asked you what a central console is. For you in your opel insignia it might be obvious, but not to others that do not have an opel insignia.
There are now 2 persons trying to help you, but if you don't help us and make a photo or explain better, we will not be able or even want to help you.
"i'm mainly talking about volume knob". Which volume knob? where? somewhere in the center of your dashboard? Somewhere in the middle console before or after your (automatic) gear shift?