Lincoln system failure — My wife and I were coming home from a trip driving on Interstate 20 at 75 MPH with the cruise control and steering assist on. Traffic ahead was slowing quickly. Normally when approaching slower vehicles the cruise control will start slowing my Lincoln long before the set following distance is reached. I usually just let the cruise control slow me down. When I realized the cruise control wasnt slowing me I applied the brakes and nothing happened. Even the engine kept power on. I steered into the emergency parking lane passing vehicles on my left. My wife hit the neutral button and the ignition button to try to kill the engine. After what seemed like a very long time we started slowing down and stopped after 2 to 3 hundred yards. The car was still in drive mode, the engine was still on and the cruise control was still engaged. Why we finally stopped I dont know. Being extremely busy pressing the break pedal and hanging onto the steering wheel there was no way I could have leaned way forward and to left to apply the emergency parking brake. Useless location in an emergency. After continuing on the steering assist wasnt working properly. It would start steering around a curve then disengage. I wasnt about to turn on the cruise control to see if it was working. Also earlier in the day every time I turned the car off and back on Id have to go thru a menu to get the radio to work and re find the station I listen to. Related? Also when the GPS is set on a destination and I turn the car off and back on when stopping at a rest area I have to reset the destination. Related? The mechanic at my local dealer was able to duplicate the problem. He rebooted the system. It happened once. Will it ever happen again? I know that occasionally I have to reboot my computer. It seems similar to me. I doubt Ill ever use the cruise control again.