I do not see how you can get out all the dirty and the sludge oil out using one of these. These might be ok for a boat, but hey your are talking Mercedes here. if you have a drain plug then use it, or go to your local oil change shop if you don't like crawling under a car.... JMHO

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2000 Ford 7.3 Powerstroke 4x4
2006 Mazda Tribute
1983 Black 300 D (donated to charity)
1993 Teal 300 D (160K) Sold
"I love the smell of burnt diesel fuel in the morning, it smells like ....VICTORY"

Semper Fidelis
USMC 1973-1976