Notes on coolant - AH20.00-N-2080-01A

Coolant composition  Normal case: Cars and Commercial vehicle engines (normal case): 50 % water and 50 % anticorrosion agent or antifreeze.

Hot countries:  60 % water and 40 % anticorrosion agent or antifreeze.

Cold countries:  50 % water and 50 % anticorrosion agent or antifreeze. In model series 415, the anticorrosion agent/antifreeze "Arteco ETX 9536 B" (yellow fluorescent) is used at the factory. With this anticorrosion agent/antifreeze, the antifreeze protection configured at the factory will change in comparison to previous Mercedes-Benz van model series as follows. Antifreeze protection is configured in a range between -25 °C and -37 °C at the factory and it does not need to be adjusted. This results in a deviating coolant composition.

Antifreeze protection  50% anticorrosion/antifreeze agent by volume provides antifreeze protection down to approx. -37 °C. A higher concentration is only necessary if the ambient temperatures are even lower. 55% anticorrosion/antifreeze agent by volume provides antifreeze protection down to approx. -45 °C. In model series 415 with OM 607 or M 200, the factory adjusted anticorrosion or antifreeze agent share is 40 % (hot countries) or 50 % (cold countries). This provides antifreeze protection down to -25 °C or -37 °C.

A concentration of more than 55% anticorrosion/antifreeze agent by volume should not be used as the maximum antifreeze protection is already reached at this concentration. An even higher concentration once reduces antifreeze protection and impairs heat dissipation. Reduced heat dissipation can result in damage to components of the cooling system and to the engine.

Water  Use water which is clean and not too hard. Drinking water often satisfies requirements, but not always. The amount of dissolved substances in the water may be of significance for the occurrence of corrosion.