What is the method for bleeding the coolant in a BMW 320?

[MariaMarie]

When adding coolant to a BMW 320, the small tube in the reservoir will automatically complete the bleeding process. It is necessary to let it sit for a while. Precautions for coolant: 1. Use the same brand: Try to use the same brand of coolant. Different brands of coolant use different metal corrosion inhibitors, so they should not be mixed. 2. Pay attention to the expiration date: Most coolants have an expiration period of two years. When adding, ensure the product is within its validity period. When replacing, drain the old coolant completely, clean the cooling system thoroughly, and then add the new coolant. 3. Avoid diluting with water: Traditional inorganic coolants should not be diluted with water, as this can cause precipitation and severely affect the coolant's normal function. Organic coolants can be diluted with water, but not excessively. 4. Be cautious when adding water: For vehicles using coolant, never directly add tap water. Instead, use distilled or deionized water.