Agreed. I think you and Grit have a good point that there is more draw than supposed to even with the disconnect.
I will have the dealership check it when I take it next week. The challenge with the MBS chassis is that the battery is under the floor pan between the front seats. Requires removing the floor covering, then removing a panel etc. Not impossible, but a huge PITA. I swear German cars make things way more complicated than they need to be. It's been starting fine when I have it here at the house as we prep for a trip and if it does get low, a 15 min drive brings it back and it's fine. It's just the sitting for more than 2 weeks that seems to draw it down. So I think the battery is fine, it's some parasitic draw in storage. I may end up installing my own disconnect switch on the chassis battery so I can ensure nothing draws on it.
ram did that, you have to pull a panel at the drivers seat.. so not just german..
