I am curious, what is so different about the cast iron, aluminum and plastic used in a M/B compared to any other vehicle. Why do M/B vehicles require special coolant? Could it be the the corrosion that a previous poster mentioned be caused by the use of cooling system flush chemicals or improper coolant/water ratios? or differed cooling system maintenance or some sort of improper electrical charge in the cooling system due to a bad ground?

Really, I would like some real answers or links to real answers other than a pat "you can only use M/B coolant or XYZ coolant in a M/B".

Just curious........