The number you have given bears no resemblance to a transmission number.
What is your transmission number? It should start 722.500
With your full chassis number the original full transmission number can be had.
For instance I looked up a customers chassis number for a 91 300sl WDBFA61E2MF030542 and got trans number 722.500 03 503646.
After looking at this I suppose your full number must be 722.500 03 493751. Give me your chassis number and I'll see what the car came with.
Bosch Master, ASE Master, L1
33 years MB technician