Quote:
Originally Posted by Jeremy5848
The factory topsider has a fitting that snugs into the dipstick tube and seals with a grommet-like fitting. Thus, it uses the dipstick tube to suck the oil out of the oil pan. This works because the dipstick tube is cunningly designed (those clever Germans!) so that it is exactly the right length to reach to the bottom of the oil pan. Funola's over-the-tube design does the same thing.
In my case, as in Mike's, I use a small-diameter hard plastic tubing that goes down the dipstick tube to the bottom. Either way works.
Jeremy
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My first attempt at a top sider on the Mercedes used a 1/4 o.d. tube inserted into the dipstick tube. It worked fine to remove the oil but was slow. My next design clamped a hose over the dipstick tube. Worked equally well to remove the oil except much faster.