Forward Alert System on MC's

[b.e.l]

Quite often in rush hour traffic I will switch off the Forward Alert warning, my question (if anyone has tried this) is "should it stay off until I switch it back on or does it switch itself back on", because sometimes it will switch itself on at the next engine start up, other times it will stay off until the next day or the day after that or after 3 or 4 startups. I thought it would either stay off until I'm ready like the Lane Departure warning or reset itself at every start up, not come back on when it feels like it. Has anyone else played with this function ?