G05 contains nitrites which (along with molybdates) have positive effect on preventing cavitation in wet liner diesels (which our MB's are not).
G05 formula does not have the dreaded by many 2-EHA salt.

G05 is no longer sold or recommended by MB. The newer HOAT formula (containing 2-EHA, blue in color) G48 is listed as backward compatible with older vehicles.

https://www.glysantin.de/sites/default/files/2018-08/GLYSANTIN_List-Cars_EN.pdf?1557799783

Since G05 is widely available this would be my first choice.

Using an IAT (older type) coolant will probably require 2-3y. change interval.