Thanks - at least I'm not crazy! I am thinking that with the next oil change, I'll use the liquivac to suck out the fluid from the pan and change a few more quarts. At this rate, it'll never be a full change of fresh fluid, but the old fluid that came out seemed fine, just dirty.

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D.H.

04 ML500
02 E430

Experience is something you don't get until just after you need it.