Steering Is Tight problems of the 2007 Dodge Charger

The 2007 Dodge Charger seized while in gear; loss of control and speed; locked steering wheel,no acceleration,while moving at 3mph in reverse once and while merging onto I-75 @ ~8mph two other times all within 5 weeks of each other but with no indicator warning dash lights illuminating. Neither of the auto mechanics could find a problem. The vehicle hasn't seized up, but the vehicle's check engine light and electronic throttle control indicator warning lights came on last week. The Dodge Charger manual says if the electronic throttle control light comes on, to discontinue use of the vehicle until an authorized dealer can evaluate the problem. July 7th 2014 the vehicle went to a certified dealer to be diagnosed. They said they couldn't find a reason for the lights being on. Sure enough they ran me up a 900 dollar bill consisting of the following repairs:filter tr 21170001/sealer no 01081003/fluid atf 01081018/antifreez 01081004/connector 09004009. I was told by the service manager these were the repairs needed: water outlet housing/transmission hydrolic service w/ programming/air filter/ fuel system cleaning we picked the vehicle up July 10th 2014 from dealership, drove it directly home. My girlfriend drove the vehicle 30 miles to work July 12th 2014,after an 8 hour shift she started the Dodge Charger letting it run idle for 5 minutes before exiting the parking lot. The vehicle was brought to a stop before entering the interstate. When she tried to accelerate the vehicle did not move or make a revving sound, the steering wheel was locked tight but hot air was continuing to blow from vents. No indicator lights were present before during or after the event. The vehicle hadn't physically acted up since the first 3 times 7 months ago, so we immediately called the dealer and she drove it directly there.