The reason MB pulled the dip stick was that they want the fluid level set at an exact temperature. The tool that is used looks like a five root flexcable with a five inch plastic rod made to the end. When inserted it goes all the way to the pan bottom and the level of fluid is gauged from the bottom of the pan, unlike a normal stick that measures fluid height from the distance from the top of the tube.
To set properly the scanner monitors temp and the fluid is gauged. Among technical forums, the common impression is that the lifetime fill transmissions are committed to a 100,000 mile life. This is well outside the realm of the original owner and suits MB fine. Other than setting the level there is nothing special about servicing the electronic trans except the cost of the fluid.
If you are interested in a FFS service schedule print out, write me during the week.
Bosch Master, ASE Master, L1
33 years MB technician