general problems of the 2010 Audi A4

My parking brake keeps setting itself and then locking in place and it will not unlock now my gear shift will not shift I have no idea what's going on and it keeps happening and then it'll stop and it'll happen again it's going to cause an accident and it burns up oil like crazy I'm going through so much oil it's not even funny.

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 interferring 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 Mini mart, 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.