hi-
i could use some help/thoughts/insight. my 1992 500sl, 136k, just stranded me today. symptom: was driving home tonight and in the middle of traffic the car initially had little forward motion, couldn't maintain any decent speed, and then no forward motion at all. all in the matter of 3-4 minutes. fortunately i was able to pull off to a parking lot. additional symptoms:
-no forward or reverse.
-nuetral seems fine (i moved the car a foot or two and it was towed without issue)
-engine starts and runs fine, no idiot lights on after engine start.
-all temp/oil specs are fine.
-check tranny fluid, all good.
-heard some sort of "noise' for 15-20sec when moved shifter from park-drive-and back to park but then it would go away
-car doesn't seem to 'recongnize' park position since i can't raise the softtop

any and all help is appreciated as the car is now at mercedes and id like to get some perspective beofr they call with a diagnosis.....i suspect big $$$


thanks

-andy