I have a 2007 Ford edge as well.  78k.  Recently I was driving on the Tri State in Illinois, odo error came on, spedometer went to zero, air bag warning light,  low air in tire,  warning indicators went on.  All when I was in a traffic jam.  I had to slow down due to traffic.  When I tried to accelorate it acted as if I was in a higher gear.  I called my mechanic who told me to pull over and disconect the battery terminal, wait a few minutes and then reconect - this would reset the system.  It did, and everything went back to normal.  This is actuslly the second time this happened to me.  The first time it reset when I shut the car off.  I have read on this forum thst others have had this problem.   Does anyone know what exactly has to be fixed to stop this problem from occuring agsin?