This sounds very familiar. Try these:
190E 2.3 Stalling Problems
"I hate to keep pounding the clogged injector bell but I highly suggest you make sure your injector nozzles are clean.
I was working on a car with similiar problems ....
Something caught my eye on one of the great posts on this site: It said "add even two bottles of Techron if you think the fuel injectors are really dirty" .... so I did. I let the car idle for about 5 minutes. I raced the engine a little bit .... let it run some more. I brought the RPMs up to about 2,500 and then I heard a sound kind of like a soft "phlup" ... and WOW! The engine runs sweet and the terrible trans problems are no more."
What's the status of your injectors?