Had it checked out at a MB shop and they found the Idle vacuum control was bad causing the idle to stay up at 1000rpm after it warmed up, now idles at abaout 700-750 always. It doesn't clunk going into drive at all, but still does it going into reverse, and bangs hard coming out of reverse, like it's stuck in rev. gear a little. They said it was probably the reverse clutches being worn causing the piston to have to travel further to engage them and it picks up speed while doing this and causes the extra banging into reverse. Does this sound like the probable cause or might it be something else? Thanks, EM