My 97 e320 MB automatic starts but shuts down when put into reverse... and now when put into drive as well. Prior to this it was at times shaking when at a stoplight for a long period of time (it never shut down on me, but I was giving it gas the few times it did it so as not to stall out). It would start every time first thing in the morning, but sometimes later in the day it would take a few times of turning the key and putting my foot on the gas to get it going. I don't know if all of these are related but thought the more info the better. Any clues?