Right, so here's a quick video showing you the thing on my ZT-T...
As explained in the video I did connect with Navcoder to check it out but couldn't find the option in there, I might have wrongly assumed Navcoder could do it. In any case I activated it on my cars with Intravee, as explained in the videos. One would also have to look at Toaf to see if the option is in there, I'm not that familiar with Toaf myself.
https://www.youtube.com/watch?v=csybDyYy53E