Audi A4 B8 Self Dipping rear view mirror (Int) with compass

[Ray Singh]

My father in laws audi A4 B8 interior self dipping rear view mirror seems to have given up the ghost.

Looking for replacements, i notice that a really cool mod in a self dipping mirror with compass. This seems that this was a USA only option?

Has anyone sucessfully completed this modification in the UK?

Thanks