Sorry, what do you mean with "it allows maps update while driviing"?
I can't understand.
don't be sorry in previous versions it was not possible to do an update while driving because tyre pressure sensors interferred/interrupted data transmission. Now you have to update map of your country (your current location) when parking first and then other maps you may update while driving
Thank you for explaining... Now I can understand.
I did know about "update on parking" just about the firmwares (not maps) for Citroën navigation systems.
So what you told has been new for me and very interesting.
2.20 -> no one map update while driving;
2.21 -> the "map in use" update while parking, the other maps update possible while driving.