C'mon Cap'n ... that is some impressive German standard automotive electrical knowledge, but please tell me you're joking.
I've had a Sears Diehard in mine for I don't know how long (at least 4 years) and it still cranks with the best of them.
My owner's manual says nothing about MB "quality of electrons" and any must-use batteries. :p
I should have read the first post closer...