Hello, I'm driving the car. It's an automatic 83 MB 300D. All of a sudden I get to a red light, I stop the car. Then when I let go of the break to start going again, the car does not move front. All of a sudden it feels like if it is in parking even though it's on Drive. I have to accelerate it a bit and I can feel it going back into 1st gear. The problem is also intermitent. Could this be the shifter bushings or what else could it be?

Thanks,
Adiel

ps: At the point where the car is stopped and before I accelerate it to put it back into first, I cannot switch the shift lever past "N". It will not go into "R" or "P".