You WANT it to do this!!!! This is the action where the internal passeges hold oil so the engine is not dry upon start-up.

To do an oil change, just crack loose the bolt and let it sit about 5 min. Then it will drain. The action of letting air in when the oil is hot will allow it to drain.

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Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS