Perhaps veering off a bit, I happened to notice in this sites parts catalog for my MB(see UID) a slew of "rebuilt" Bosch batteries. Many were for battery groups other than what my MB uses. With that said, I found one near the bottom of the list that sells here for $282 and change! Again - a "rebuilt" battery.

I wonder if there's a difference between "rebuilt" and "reconditioned" ?

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'91 300-SEL