I use an old spark plug socket, reversed so the large "hex" is on top. This fits into the large hex/allen head on the strainer. I use a largish pipe wrench with about a 2-3 foor "cheater" bar to break the strainer free. Those suckers can be tight! I usually have to apply a couple applications of "boot power" before it comes loose.

There's a couple of posts on this forum regarding the removal of the strainer.


http://www.peachparts.com/shopforum/vintage-mercedes/14401-diy-removing-fuel-tank-drain-plug.html

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