My sister took the coupe today to go shopping and ended up calling me from her cell phone telling me that the car was in rough shape. Here is what she described to me as to what happened:

The temperature went up to approximately 100°.
The car started smoking.
Car started to move in jerking motion with tires screetching.
Car wouldn't drive forward.
Bad smell inside the car (possibly coolant smell that has been there since the flush).

I called a tow truck and had the car sent home on the flat bed and was honestly too discusted to even look at he car. I called my mechanic and over the phone he feels like the transmission may be the problem.

Does anyone have any comments or ideas as to what could have possibly happened?

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1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz