5.3.2. Cooling liquid
Cooling liquid consists of mix of antifreeze, additives for anticorrosive protection and water. At the plant the concentrate which chemical composition is specially developed for Mercedes engines is applied. Mix of water and antifreeze depends on total of cooling liquid of the cooling system which differs for some types of engines depending on equipment a little. The share of antifreeze has to make 50% – it protects liquid from freezing at a temperature of -37 °C. At the content of antifreeze more than 50% worsen a heat transfer of cooling liquid. Content of antifreeze should not be lower than 40%, otherwise effect of antifreeze, means of corrosion protection will worsen and at a negative temperature cooling liquid will begin to get denser.