Joepate78

Ok guys I need help. I have a 2002 S500. Since the day I got it the transmission has not shifted correctly. After start up it will do a real fast 1-2-3 shift then never come out of third unless I turn the car off and start over. How ever if I manually shift the car from Drive to neutral then back to drive while going over 40, I can ge the car to shift up sometimes. Others it will not go into gear till I slow down to 20 then it goes right back into 3rd. I have replace the shift solenoids, conductor plate, shifter, and the TCU. I am also getting a check engine light with the code P0730 powertrain incorrect gear ratio. Please what else can it be that's is causing this. I am Tired of spending only with no results. Thank you in advance for your help.

Plutoe

Dear deep pockets. I suggest you review your work process on the conductor plate,however prior to doing it again correctly have the transmission faults read to help in the rework process.
As you have a 4000 dollar car you may want to consider placing in auction.