I'd like to thank everyone for all their suggestions when I couldn't
find a good Mercedes machanic in Toronto.
I found one and he is awesome. Turns out the back and hardest glow
plug to get to was gone and another needed cleaning for contact. He
switched me to a synthetic oil and found that the energy drain was
caused by a fuse that probably been added for a cell phone or a radar
detector.
Once again thank you
Judy