I did the search on battery drain. I actually showed my mechanic this thread at his shop. He is generally very good and technical, and usually can fix any problem with my cars with no issues, but this one he couldnt get to the root of it.

I am thinking it has to be something simple that was overlooked, whether it has to do with the actual procedure of the test or an item not tested properly.

Anyhow, the car is at the mercedes dealer right now. They are supposed to get back to me this afternoon on what they find. Hopefully, they can diagnose exactly whats wrong. Once i find out, i will report back here on the results.

Thanks for everyone's help and advice. Its truely appreciated.