Well, i picked up my car from the mercedes dealer and he basically said the same thing as my mechanic. He said he got about .1 draw, but he couldnt find a specific drain. He also added that its normal for some w140 to do this. (which i doubt, since i have owned several 140's and this is a first).

The advisor also added, that the battery will go to a low level if the vehicle is not started within a week. So he recommended regular start up.

Not the answer i was looking for, as my mechanic and I did the same test, and was hoping the dealer would find something we overlooked.

My mechanic suggested, that i leave my car for a day not started, and then try to start it, then for couple more days not started and start it again, just to see how long before we have difficulty starting it again.

Anyhow, thanks for everyone's help, much appreciated.