Hi, after several weeks of stress and several sleepless nights, this is what has transpired.
I visited another local shop specializing in Mercedes Benz, spoke to them, explained what had happened so far, and agreed to leave the car there this past Monday morning at 8am. They said they would run the computer on the car.
Now keep in mind, from what I heard from the previous shop ( the one servicing my car for two years ), they had also looked at the car with a computer looking for faults.
Apparently there are different levels of computer for Mercedes Benz. The new shop guy called me at 11am to tell me that they thought they had pinpointed the problem and they needed to do a transmission adaptation.
Two hours later they called again to tell me that the car is fixed, no more slipping, but just in case they were going out for a test drive. I show up at 2pm, pay my bill for basically two hours of labor, and it's been driving without any problems since.
So, what nags me and what I would like your opinions on this: Did I need to spend so much money rebuilding the torque converter and replacing the radiator? Or simply doing a transmission adaptation would have taken care of the problem?
Thank you in advance for any thoughts about this.