MIB 1 was cars prior to about 2016 I think, after that its MIB 2.
MIB 1 was the original navpro with the physical buttons, mib 2 is the bigger one with touch buttons only.
For basic nav, mib 1 had I think a 6 inch screen, mib 2 has a eight inch screen.
A Mk7.5 golf is definitely MIB 2.
Does that help?