I don't know if your model has an OVP, or OverVoltage Protection relay. But it is the source of hot start problems. Do a search on "OVP" and you will find a wealth of information on the $50 relay that causes a ton of elusive problems.
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car