:p
got back to acapulco punched the door unlock button from
key, doors opened, turn to on position, held pedal down for
about 5 seconds, and ml started with no issue whatever.

So for sure the battery can sit for 3 mths and start up easily.

( at least if it is good when parked. By the way it is a mbz battery )

so i am glad the jump issue never came up.