Note: Do not spill diesel fuel on the cooling system hoses. If it does, clean the hoses immediately! The water drain valve is not available on all versions.
Connect a transparent hose with a container for removing water to the water drain screw "1". Start the engine. Carefully unscrew the water drain screw "1" by ¼ turn. Drain off approx. 0.3-0.4 l of liquid. When clean diesel fuel starts to flow out, close the water drain screw "1". Switch off the engine and disconnect the hose.
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