
In temperate climates, the system can be filled with plain water, but the reservoir should be no more than two-thirds full to allow for expansion when the water freezes. In cold climates, a special windshield washer antifreeze should be used to lower the freezing point of the fluid.
Warning! Do not use antifreeze in the cooling system, as it damages the paintwork.
(The article text was copied from an online resource «BMWMAN»)
