What to Do When a Mercedes-Benz Shows Insufficient Coolant?

1 Answers
DelMary
07/29/25 11:27am
Coolant warning should not be ignored while driving. If the coolant warning appears during driving, it indicates insufficient coolant levels, which can lead to overheating and boiling of the coolant. Continuing to drive under such conditions can exacerbate vehicle malfunctions. The coolant warning system: Consists of two electrodes. When the coolant level drops below the electrodes, the circuit is interrupted, and the vehicle's computer detects this signal as insufficient coolant, triggering the warning light. During vehicle usage, it is essential to regularly inspect the cooling system and coolant levels. If the coolant is found to be insufficient, it should be replenished promptly. Handling coolant warnings: If the coolant warning is caused by excessively high engine temperatures, it is best to pull over safely without turning off the engine. Allow the engine to idle, open the hood to facilitate cooling until the temperature warning disappears. If the warning is due to insufficient coolant and no coolant is available for immediate replenishment, you can add an appropriate amount of purified water—preferably soft water, such as distilled water. However, avoid using hard water like tap water, and do not add excessive amounts, as this can alter the coolant's boiling point.
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