Problem one the car was burning through a quart of expensive oil every 300 miles. Took it in, dropped the engine, changed all pistons, removed crankshaft oil seal, faulty high mount brake light, pressure regulating valve all replaced. Car was accelerating with and without hesitation, but dealer duplicated the occurrence and said they fixed. One month later, car smelled like gas and was taking off on it's own brought back dealer could not duplicate. Very bad smell of gas and rapid acceleration -dealer removed engine again replaced all valves, diagnosis purge valve stuck. Suspected injector seal.replaced 4 injector seals, smell persisted.replaced intake valve, remove and replace purge valve assembly. Pistons have all been replaced, engine has been completely removed twice, and the transmission is still jumping and the car accelerates by itself.Audi refuses to recognize the problem, I have only 1200 miles left on warranty. I have only had this car 7 months and am afraid to drive but Audi offers no options-I asked for extended warranty on the engine and they said no. I have the car in my possession with the acceleration issue and periodically smells of gas. I drive 3 children to and from.

- Pasadena, CA, USA

During an attempt to accelerate the gas pedal was pushed to the floor (Audi A4 '10) and remained stuck to the floor even after the foot was removed. The car has a manual transmission and was shifted into neutral at this time. The tachometer indicated the engine was redlining in neutral while the foot was still off the accelerator pedal. This engine speed lasted for approximately 5 seconds then the accelerator appeared to become unstuck and car operation returned to normal. An aftermarket floor mat was in place at the time of the incident. However, the mat was "zip tied" back to the driver's seat mount so it would not shift forward and possibly interfere in clutch, brake or accelerator operation. After this incident, the same day, the driver checked to make sure the floor mat was properly placed and still zip tied and it was. The floor mat was zip tied to begin with because there was one other episode of unintended acceleration approximately 1 year ago that the driver though may have been due to slippage of the floor mat. Obviously this initial event a year ago could have been due to causes other than the floor mat.

- Brookfield, IL, USA

Driving to work on a country roadway, passed a vehicle and began to pull back into my lane, releasing the gas pedal, but the Audi 2010 A4 continued to accelerate even after braking, speeds in excess of 85-90 mph. Brakes functioned, pulled over, stopped car. Looked down, nothing interfering with the gas pedal. Restarted car, speedometer needle jumped to 7000-8000 RPM, car revved. Needed to get the car to a safe location, proceeded to drive down the road with the brake pedal depressed, brakes began smoking but made it to a MINImart, parked and stopped car. Car towed to dealership, dealership said there was nothing wrong with the car. Contacted Audi of America, they reviewed the records and said that there was nothing wrong with the car. Vehicle accelerated to high rate of speed despite driver's attempts to reduce speed. Have not driven vehicle since this incident on 7/7/11. No prior problems, but since I stopped the vehicle and looked down at the gas pedal, there was nothing in the way which would have caused the vehicle to accelerate. Dealership states no codes were thrown and nothing shows up.

- Linden, CA, USA