This was discussed a good bit on the Pirate Board. If you do a search in the Mercedes Forum you should find some info. http://www.pirate4x4.com/forum/showthread.php?s=&threadid=143232
Just thought of something else to try first. It's been a while since I was the moderator at Pirate but I think I put an FAQ link that will lead you too this. Might be an axle FAQ link of some sort. http://www.pirate4x4.com/forum/showthread.php?t=143224 It has been discussed there since but the new moderator decided to not keep the FAQ thread updated.
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