1985 300CD Automatic - broken fan in transmission?

[frnorke]

From a previous thread, I had purchased a 1985 300CD from Florida and driven it to Virginia. It drove fine. I didn't have time to fix all of the stuff required to pass VA inspection so I had a MB dealer do it (not a good idea I've learned). When I went to pick up the car the first time (after it had passed inspection) one of the headlights was still out. I told them this and they kept the car another day to fix it. When I went to pick up the car the second time, it wouldn't engage in D, S, or L. R was fine. The dealer checked it and couldn't figure out the issue. They changed the transmission fluid to see if that would help to no avail.

I had another mechanic at a different shop look at it. Originally I thought it was a B2 piston issue. The mechanic says that the "fan" is broken in my transmission. I have never heard of a transmission having a fan. Can someone explain to me what this is? thanks.

V/r,
Kurt