Check the battery FAQ's on the internet, and additives in the electrolyte have shown no measureable improvement.
Save your money.
Better yet, get an OPTIMA battery. Ours have last now over 5-years, other's have had theirs for over 10-years! They don't leak!
You can get an OPTIMA or made by OPTIMA battery on Ebay for about $69-$80
1988 360TE AMG