I do not think so as that would neutralise the acid. Baking soda or powder. I am not sure of the right one that is usefull for cleaning up the resultant mess on external portions of the battery.

Just put a few copper pennies on top for the acid to attack I do not know if your american pennies are made of copper or steel.

American Pennies are Zinc cores with Copper plating. In acid, they release zinc. Eating them can kill your dog.

American pennies cost more than 1 cent to make and transport. They should be outlawed!

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1979 240D, 4spd manual, Power Sunroof, manual windows, 147k miles, Pastel gray/Black MB Tex.
1991 300D 2.5 - Smokes like it's on Crack!

I have used an electronic battery desulfator to rejuvenate various batterys. It works for a while and can actually restore a weak battery to the point where it will start a Mercedes. I don't think the effect is too long lasting however but you may get another 6 months or so of life. They work by applying a short duration pulsed short circuit to the battery which causes the sulfate to fall off the plates to the bottom of the battery exposing clean metal to the electolyte. How much metal is left ultimately determines the remaining life of the battery. As far as something you can pour into the battery to revive it I have my doubts. Cheers Dan

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It's always something simple
91 300D 603.960 (from japan) 194K
92 Toyota Diesel Landcruiser HDJ81-t 116K
02 Golf TDI new head courtesy of PO
87 300D
97 BMW 525 TDS Wagon 5spd
bunch of Onan and other diesel generators