Well sure enough, Auto Zone did have the Great Neck set. The metric version was $2 more than the SAE version. So I paid $12. It was worth it. Unfortunately I now have to find a replacement drain plug for the rear diff. The fill plug is ok, but the drain plug is so chewed up it is almost unrecognizable. Obviously someone did not have a 14mm hex and used pliers, hammers, and flat screwdrivers to remove it. Shamefully, I had to also use the screwdriver and hammer to tap it out. I did rework it a bit and was able to use a 1/2inch socket extention to put it back in. I am gonna call the local MB dealer here and see if I can get another plug from them. Hopefully it won't be too expensive. Other than that everything went great. I got real purty oil in the diff. now. The next project is the tranny oil and filter. Does anyone now if those are hard to come by or no?

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Just a head bangin' hell raisin' hillbilly man