Simmo,
In reply I just added that I tried raising base idle and the computer put idle back to 500rpms, so I know that the computer is in control and is responding. Could the RPM sensor on the rear of the motor be getting a false reading or sending a false signal? With heat, resistance increases. Does this sensor generate its own voltage, like a piezo cristle Like in the knock sensor or is it a hallaffect switch? I am new to MBZ, but know OBD2 verrrry well.
I love this little car but the stalling is a safety issue.

Spang