Partially release the coolant expansion tank for the low-temperature coolant circuit

• Draw out the tank vent line in the region (1)  and set it aside.
• Unlock the clamps (2)  in the direction of the arrow.

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• Unlock and disconnect the tank vent line (1)  .

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• Unclip the coolant vent line (2)  from the clamps in the region (1)  .

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• Carefully draw out the coolant expansion tank (1)  and set it aside.

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