So I'm reading the "AGM vs Traditional Battery" thread and see mention of re coding when switching to an AGM battery. Is this necessary?
I've basically heard of BMW requiring this. Mercedes doesn't, at least the years I have, maybe some of the newer models with aux batteries. My AGM in my 2008 E-350 is now 12 years old. Still original. Still fine.
Never owned a BMW, but did own the same MB as yours, bought it as a CPO 3yo with 10K miles on it, the battery went after 1 yr (4 yo) I think that because it wasn't used much the battery suffered. I replaced it with the same MB battery and never had any problems.
The battery on modern cars performs a lot more tasks than before and an AGM will give you better performance, the only thing is that when it fails it will give no warning. The other thing is that one needs an "Intelligent" charger like C-Tek to keep them healthy.