Hi rooney4. It's obvious that your car has excessive rest current draw. The problem is most likely the vehicle interior CAN (data bus) is staying in it's "ready" or "awake" state. This can cause various control units to remain "powered up" even though the vehicle is not in use. Removing the fuses one at a time until the rest current draw is within spec's is the usual method used to diagnose problems like this. On your car though, disconnecting the control units one at a time is probably the way to go. Your dealer should be well aware of this. Since the early 90' MB has been making cars using this networking technology, so current draw issues are nothing new. MB has a scan tool (not even available to dealerships!) that can greatly simplify the diagnostic process, but the factory rep. is the only person who can do this. As far as you sitting in the waiting room? I'd suggest leaving the car at the dealer. Unless they get lucky, this could take a few days to figure out. Good luck and let us know how it goes.