Can't even fathom a guess on that one...

...as new as your ML is, I would bring it to the dealer and let them figure it out. There may be a service bulletin out on that. Otherwise, they may have to keep it for a day or so to recreate the problem.

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car