The contact owns a 2006 Mercury Grand Marquis. The contact stated that while stopped at a stop light, there was an increase in the engine rpms. The contatc had to apply heavy pressure to the accelerator pedal to keep the vehicle stopped. The failure occurred intermittently and the vehicle also experience unintended acceleration. The vehicle was taken to the dealer, who inspected it and stated that there was no failure. The manufacturer was not notified. The failure mileage was 2,000 and the current mileage was 111,000. The VIN was unknown.

- Glendale Heights, IL, USA

The contact owns a 2006 Mercury Grand Marquis. The contact stated the vehicle surged forward on three separate occasions while the brakes were engaged. During two of the failures the contact applied excessive pressure to the brake pedal to stop the vehicle. On one occasion the vehicle stopped accelerating on its own.the vehicle was taken to a repair shop but the mechanic was unable to diagnose the failure. The vehicle was not repaired. The manufacturer was made aware of the failure and the contact was advised to take the vehicle to an authorized dealer. The failure mileage was 28,000 and the current mileage was 32,800.

- Flagler Beach, FL, USA

I am certified safety professional with over 30 years experience working in the occupational safety field. Twice within the last week, my vehicle accelerated to 5000 RPM while pressing the brake pedal to stop at an intersection. My foot was on the brake pedal and not on the gas pedal. I had to quickly shift into neutral to avoid entering the intersection into crossing traffic. Brakes would not hold. A few seconds after shifting into neutral the engine decelerated back to normal on its own. Carpet was not the issue. This is a serious malfunction that could have killed me or someone else.

- Medina, NY, USA

Car acceleration on its own, estimated start end of Dec.2009. Estimates that it happens once a month, no clue as to when it will happen. Going to slow down / park, car starts to accelerate on its' own., have to press hard on brake and use 2 feet.. brought car into dealer 4 times between Jan thru June, at this point. Dealer says can't find anything.

- Naples, FL, USA

The contact owns a 2006 Mercury Grand Marquis. While driving at approximately 30 mph, the vehicle suddenly accelerated up to 50 mph although the contact depressed the brake pedal. The vehicle would not slow down even after the contact turned off the ignition and continued to coast up the hill until it crashed into a curb. There were no injuries but a police report was taken. The vehicle was towed to a local repair shop where it was repaired. After the repair, the dealer performed a diagnostic test on the vehicle but no failure was found. The contact called the manufacturer and was told that they would get back with him for an investigation. The current and failure mileages were 30,351.

- Jefferson City, MO, USA

The contact owns a 2006 Mercury Grand Marquis. The contact stated that when utilizing the cruise control at 60 mph and higher, the vehicle would abnormally accelerate without warrant. He was able to deactivate the cruise control by depressing the brake pedal but the engine continued to idle violently and the vehicle continued to accelerate. The contact was unable to deactivate the cruise control using the deactivation switch on the steering wheel. The dealer could not duplicate the failure. He stated that the vehicle was safe to drive and the failure was contributed to either the floor mats or driver error where the contact was mistakenly hitting the cruise control resume button. There were no repairs made to the vehicle. The failure mileage was 26,000 and the current mileage was 33,000. Updated 6/3/10 the consumer stated tapping the brake didn't always release the cruise control. Updated 06/17/10

- Trenton, FL, USA

Sporadically and without warning, my cruise control will activate causing the vehicle to immediately accelerate. I had been using the control but had de-activated it but depressing the brake which leaves the unit "on" but not activated.

- Holland, MI, USA

The contact owns a 2006 Mercury Grand Marquis. When applying pressure to the brake pedal and placing the vehicle into reverse, the gear lurches forward unexpectedly. The contact has to switch the vehicle into neutral to stop the unintended acceleration. He took the vehicle to the dealer, but they could not identify the cause of the failure. The failure mileage was 27,000 and current mileage was 29,000. Updated 07/17/09 the consumer stated on 2 occasions, he started the vehicle; put it in drive and the motor raced and the vehicle lurches forward. He had to put the vehicle into neutral and turn off the ignition to stop the vehicle. The dealer was unable to duplicate the consumers concern. Updated 07/17/09.

- Hanover Township, PA, USA

Was getting on highway, accelerated more than normal to pass a very slow vehicle entering highway from 5 mph on highway (estimate 80 to 90% of full throttle), when I was safe of slow vehicle and let off the pedal, vehicle continued to accelerate to about 83 mph as I recall, I continued to press brake, still accelerating, pressed steering control buttons to make sure cruise control was off (did not have it on previous to this), pressed brakes again and again, finally vehicle slowed down just before I was going to turn of the ignition. Did not have the car checked out, did not smell or see anything irregular, vehicle increase in the continued speed was felt with some G-force before it went back to normal operation. Appears that it just went full throttle on its own I could feel it really moving. Has only occurred once, I also emailed Ford regarding this issue. Luckily it was 5 a.M. in the morning no harm done, just frightened. Bought car used @ 45 K incident occurred around 47,393 miles.

- San Antonio, TX, USA

2006 Mercury Grand Marquis sedan that surge forward while in gear* the consumer stated immediately upon taking delivery of the car the vehicle would occasionally lunge forward. The consumer stated notified the dealer of this defect and the dealer stated that there was no problem with the vehicle. The consumer stated one incident is when a pedestrian was crossing the street in front of the car the consumer had to jam on the brakes to avoid hitting the pedestrian. The consumer stated they feel this is a big safety hazard and would like the problem assessed.

- Naples, FL, USA

The contact owns a 2006 Mercury Grand Marquis. The contact stated that the vehicle accelerates intermittently. When switching gears from reverse to drive, the vehicle jolts. While at a stop light, the contact had to use maximum pressure in order to apply the brakes. The engine tachometer indicated that the vehicle was at 2000 RPM. The contact stated that the tachometer is normally at 550 RPM. The current and failure mileages were 9,000.

- Brownsburg, IN, USA

When I started the engine each morning on the 2006 Mercury Grand Marquis ls it revved to 2000 rpms for 5 or 6 seconds, then down to 1000 rpms for about 2 seconds, then down to normal. It seemed to me it was going to damage the engine revving so high when the engine was cold and very little oil in the upper portion. What could be done about lowering the starting to rev.

- Debary, FL, USA

: the contact stated when entering an off ramp at 30 mph and braking into the turn, the vehicle began to accelerate without warning. Extreme pressure to the brake pedal was applied to slow and finally stop the vehicle. A moment after stopping the vehicle, the engine slowed and began to operate normally. When taken to the service dealer, the problem could not be recreated or identified. The manufacturer was notified. Updated 11/30/2006 -

- Mansfield, OH, USA

: the contact stated while normally applying the brakes, the vehicle lurched forward suddenly, requiring extreme pressure on the brake pedal to stop the vehicle. It was taken to a service dealer, who was unable to determine the problem. Updated 10/18/2006 - prior to the above incident the vehicle lurched forward while approaching a stoplight. The more pressure the consumer applied to the brake pedal the more the engine raced. The vehicle continued to travel forward through the crosswalk and into the street. Luckily no one was in the crosswalk and no cars were coming through the intersection. The consumer has to turn the vehicle off to get it to stop.

- Silver Spring, MD, USA

: the contact stated there were three separate problems with the vehicle. The first problem occurred when the automatic pedal adjuster was being used the engine revved. The second occurred while driving, the accelerator pedal was difficult to depress, after several miles of driving in this condition, the contact pressed and released the pedal and it suddenly resumed normal operation. While in stop and go traffic driving at 20 mph the vehicle surged forward, while the brakes were applied and rear ended another vehicle. Seatbelts were in use; no injuries were sustained to the four occupants of the contacts vehicle, however the driver of the other vehicle sustained injuries. The police were on scene but no report was filed. The vehicle was returned to the rental Agency and another model was issued.

- West Wyoming, PA, USA

: the contact stated while attempting to apply brake pressure at low speeds the brakes failed, causing the vehicle to accelerate. The dealership was unable to duplicate the problem. Updated 05/30/06.

- Kettering, OH, USA