I would not put any weight in there not on this list:
https://bevo.mercedes-benz.com/bevolisten/229.3_en.html

Personally, I run 5W40 here in North Georgia as 0W40 is just too damn thin.

I was running 5W50 in the summer, but it's just too thick for a cold start below about 45F. Try Mobile 1 5W50 if you are concerned about the heat of summer, but again, if you start the engine at 45F or below, you WILL hear the lifters banging for up to 60 seconds, it's just too thick. Other than that, find a 5W40 on the above list and go with that.