That is a Mk3 nav

And to let you off, the SET screen is indeed not showing the SW version :-)

You would likely benefit from a RR OS software update.

Original OS disc is here:
Home

Make a CD from the image file using ImgBurn

PS: NavCoder would confirm if it has a RR OS or a BMW OS loaded.
If BMW OS, then update to 3-1/63 and enjoy a much better menu