mb specs are dot4+. i use motul race fluid and thirteendog just flushed his system with ate super blue.
you want a fluid that meets specs and has the highest wet braking rating for the way you drive.
i drag race and need fluid that can withstand hard braking from 115 mph. some autocross and need fluid that wont boil from repeated hard and constant braking.
if your just driving the car daily a wet temp of 275 should be fine