2003 A6 Avant 2.5TDI Auto Sport 163

I have a problem with the air con / climate control unit cutting in & out (and mainly out) & want to access the unit in the central console to check for loose connections etc.

I seem to be getting a clicking from here & some of the cutting in & out coincides with road bumps....

Any help & guidance - links to other threads etc - would be helpful in allowing me to get into this unit.

Many thanks ~ John