Oh ok. Thanks for the information. I kept my old filter to cut it open just to see what the filter is made up of. Looks like I will eventually find out if it is really dirty or clean.

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver