First of all, this forum rocks - thank you all for contributing!
I recently installed an AVIC D3 in my 2006 Golf TDI GLS - I used GomobileR32's DIY over on VWvortex to find all the correct wires. All wires to the Metra harness, VSS, night mode & body ground were stripped, twisted, soldered, liquid electrical taped, electrical taped (after the liquid stuff dried for at least 2 hours) and bundled with cable ties.
Yes, this took quite a while.
I did the bypass mod. I confirmed the moved mute wire, ground & parking brake wire were connected, grounded through the harness as well