The emergency brake on my Sportage has a rather interesting problem. If the car sits for awhile and isn't warmed up( essentially it hasn't been driven for a couple hours) then the emergency brake will work. However, when the car has been driven for a while and you attempt to use the emergency brake it does not work properly. The peddle clicks down like it should but the emergency brake itself is not working. If the car were put in neutral it would role right out of my driveway. Any ideas?