The reason that clearing the "P" code from the ODB2 system didn't help is that CODES from TRANS computer must also be cleared.
THIS is a common problem & might be simple! however it can be costly as well.
The electrical connection at the bellhousing for the valve body might be full of trans fluid & that can block data transfer fron the valve body to the computer.
We replace part number 140-270-02-50 all of the time for this problem. $10.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)