I tried fisning out whatever is in the inlet hole...but nothing is coming out, and when I look inside I can see nothing obstructing the opening. Using a magnet yields nothing as well...Is the next step opening up the vacuum pump? Can this be done without parts going everywhere? Or am I better off leaving it alone?

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Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles