broken4door

Hello everybody, I am new to Mercedes diesels automobiles and would appreciate some information please. I purchased a 1987 300d with a bad transmission, the car was ran with very little fluid, and what trans fluid came out looked like mud. Are Mercedes W124 transmission interchangeable between 1987 300D and 1989 300e? I have a 722.31702 transmission in my 1987 300d and found a very low mileage wreck 1989 300E with a 722.358 transmission and a 103983 12 156859 engine. An help will be much appreciated, I was miss lead by the person that sold me this vehicle, it drove very well for 2 days then fell apart, the maintenance records receipts that were provide ended up being from another Mercedes, so know I am trying to deal with issue. I am broke and poor, so any information would much be appreciated,

Thank You very much