What does it mean when the Passat displays a check coolant indicator?

[VivianLee]

The Passat displaying a check coolant indicator means that the coolant level is insufficient and needs to be checked and refilled. Solution: Check whether the coolant in the coolant reservoir is between the "MAX" and "MIN" marks, or directly inspect if the coolant in the radiator is sufficient. If the coolant is insufficient, it should be replenished. If the coolant level is adequate but the warning light is flashing, you can continue driving normally. Function of coolant: The coolant's function is to cool the engine. Coolant is also known as antifreeze. If the coolant is insufficient, it cannot effectively cool the engine, leading to abnormal engine operation. Coolant helps prevent engine failures, avoids radiator overheating, and provides long-term protection for water temperature, making it usable year-round.