Transmission Stuck In Gear problems of the 2007 Mercedes Benz S550

Vehicle becomes stuck in gear while driving down the road. Will not shift, sometimes you don't have enough power to move quickly. For example vehicle was stuck in 6th gear after leaving the highway. I could not accelerate to move the car. I had to shut the car off to reset the computer to get the car out of 6th gear. This has happened at least 10 times over the past 3 month period. Many other owners of this car have experienced the same transmission failure and that is very dangerous because the car lose power when it is stuck in a gear. The only way to fix the problem is to shut off the car and restart it. Mercedes benz should be held responsible for this issue.