Are you checking the level with the car running? If yes, then it seems to me that it is obviously overfilled. Transmission fluid expands as it gets hotter. The special dipstick measures from the bottom up. It has a marked band for 20 deg C and a marked band ( range ) for 80 deg C. The band for 80 is higher up than the band for 20.

If the level is at 80 band and the temp is at 25 C then you have a problem.

The next question is whether they used the correct MB synthetic fluid.

Steve