According to my wife, one morning she made a right turn at slow speed and certainly the RPM surged up by itself but the car didn't accelerate. It was still in gear as she pressed the gas pedal harder to move to the side but the car would still move slowly with a high RPM. Since then it has not happened again.
I will find a stick to check the level of the transmission fluid tomorrow. The car is a W210 base model with 215k miles on the original trans. I had the trans fluid replaced every 60k mi since new. About 25k mi ago, I also had the automatic transmission conductor plate replaced along with the fluid change.
Any idea what is happening with this car? How long should the conductor plate last? Or is it time for a trans rebuild? Please advise. Thx

Maybe the motor mounts are ****, the engine shifted on the turn and it briefly popped out of gear?

Ideally check for transmission codes. Through the 38-pin connector, not OBD port.

Do you have a dipstick to check fluid level?

Was the bushing/connector replaced with each fluid change?

Have you checked for fluid in the TCM?

Sixto
98 E320s sedan and wagon
02 C320 wagon

The engine mounts were replaced 25k mi ago.
I did use a dipstick to check the fluid level this morning and it was fine. The TCM looks ok too. I will google on how to check for the trans code using the 38-pin connector. Thanks for that info.
What bushing/connector you replace with each fluid change?

This thing - https://www.pelicanparts.com/More_Info/2035400253.htm?pn=203-540-02-53-MBZ&catalog_description=Adapter%20Plug%20With%20O-Rings%20-%20Transmission%20Cable%20to%20Conductor%20Plate%20&SVSVSI=3798

Might be the only time you’ll need a 7mm socket.

Sixto
98 E320s sedan and wagon
02 C320 wagon

thank you Sixto