While changing my wiring harness, I came across two small parts that I have a question about. This is a picture of the front of the M104 engine. What are the two small cone-shaped parts at the bottom of the silver box on the left of the picture? They just plug onto two small posts and they have a fine screen inside. As you'll note in the second picture, the base of these parts are cracked. What do they do?

Thanks!

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D.H.

04 ML500
02 E430

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