What color is the antifreeze in your coolant reservoir now? Is it sort of
red? If it is, then it is MB coolant... or Zerex Z-05 that you can find at
Autozone. Cost about $10 a gallon and you mix it with water... I suggest 2
gallons of water to 1 gallon of coolant for 66% water/ 33% coolant... I find
50/50 too thick for the cooling system... harder to dissipate heat.