Cruise Control problems of the 2005 Mercury Sable

Gas pedal sticks. Cruise control randomly turns itself on vehicle accelerates on it's own without warning. Have had to shut the car off or shift into neutral while driving. It's absolutely terrifying.

My 2005 Mercury Sable suddenly had the cruise control stop working approximately 30 days ago. The next day some serious issues began to happen. I was traveling down a curvy 4 lane road at the posted speed limit of 45mph. Knowing there was an up coming light I took my my foot off the brake and anticipated the normal deceleration. Suddenly rather than slowing down my engine independently revved up to 3/4 rmp causing me to instantly jump to 50/55 mph. Apart from the immediate panic I have never had a vehicle react in this manner and was at a loss for what to do. I hit the brakes extremely hard to combat the acceleration while putting the car into neutral (still going 40+ mph). Despite having the car in neutral it was still revving itself at around 3 rpm. After slowing down to a safe speed I turned into a parking lot and immediately turned the car off. I left the car resting for about minutes and when started again, it immediately began revving the same as before. I am very concerned and have been since troubleshooting with my mechanic. This is clearly a very dangerous issue and significantly lowers my mpg while putting triple the stress on my brakes.

Got onto express way and tried to set cruise control at 70 mph. Cruise control wouldnt maintain speed, so I shut off. Got off of express way to a 40 mph zone. Took foot off of brakes, and car was accelerating to 60 mph. In park 4000 rpms. Incident has occurred 4 times in the past 3 days. Until this time, I never had any problems. Now it will randomly kick on at any point in time (hour into driving, five minutes, 3 hours ect. ) cannot get to shut off when it occurs. Have not used cruise control option since 1st incident. Does not stop if you shut car off and turn back on.

My car has accelerated without application of the throttle. I did not have cruise control on or engaged and the car continued to function as if the gas pedal was depressed. This has happened on several occasions now. Once, while at a speed of about 30 mph, I was able to safely pull over and put the car in neutral. The engine rpms continued to race upward as if the car was under load and under throttle input. There were no floor mats or any other obstacles or objects making contact with any controls or devices.

Vehicle maintained and accelerated speeds while on level ground with no cruise control engaged and foot off of the pedal. Depressing the brake slowed the car down, however rpms were still pushing 3. 5x1000 according to the instrument panel. Turning cruise control on/off seemed to fix it. Upon starting the engine, car idles extremely high upwards of 2. 75-3. 00x1000 rpm's. Turned cruise control on and off then I heard a click. . . Then power cycled the engine and normal rpm's since. However cruise control does not work anymore.

While driving recently, my 2005 Sable suddenly accelerated, forcing me to brake and put the car in neutral while at speed. This has happened 3 or 4 other times. In the past. Now the cruise control does not work anymore.

Entered interstate 81, accelerated to 65 miles per hour and set cruise control, drove for several minutes when for no apparent reason the car accelerated to app. 85 miles per hour at which time the cruise crontrol ceased to work. I would like to know if there were any other reports of this happening.