I have never used an f series (EU) version of the z (US/CAN) series, however I think US versions may behave differently than EU. For example, pionara has a thread (http://avic411.com/index.php?/topic/35315-soft-parking-brake-mod-aka-safe-mode-bypass-menu/ ) on his progress in hacking the US/CAN version to enable "Safe Mode" setting that is present on the EU units.

Probably has something to do with liability laws. Consider yourself lucky. However it is an easy mod.