Cooling liquid (Mercedes-Benz E-Class W210)

The coolant consists of a mixture of antifreeze, anti-corrosion additives and water. The factory uses a concentrate, the chemical composition of which is specially developed for Mercedes engines. The mixture of water and antifreeze depends on the total amount of coolant in the cooling system, which varies slightly for some engine types depending on the equipment. The proportion of antifreeze should be 50% - this protects the liquid from freezing at a temperature of -37°C. If the antifreeze content is more than 50%, the heat transfer of the coolant is impaired. The antifreeze content should not be lower than 40%, otherwise the effect of the antifreeze, corrosion protection agent will deteriorate and at negative temperatures the coolant will begin to thicken.

Material taken from a web resource: MERCEDESMAN.ru