Which Automatic transmission fluid should i buy?

Time for changing the oil in my Mercedes W222 (722.96 gearbox).
I plan to buy Mercedes-Benz Genuine Automatic Transmission oil 236.15.
Gets 39 options when I search in Bevo.
1. Apart from the size of the packages, what are the differences between the items?
2. What do the last 4 letters mean (eg AULD).
3. Which oil should I choose, living in Sweden?
Regards Erik Sjödell


