Just a note. Driving the car for a couple of miles by no means gets the transmission temperature to hot. The engine temperature guage has nothing to do with the transmission fluid temperature.

When I change my fluid, I initially adjust the level to about 10mm below the
low mark. Again, I didn't dream this up, it comes from expert MB mechanics. Then when you can drive for say 20 minutes at highway speeds, pull over and check the hot level.

Steve