If the problem can't be reproduced by the dealer at all, but happens to you quite frequently, then is really has to be something you are doing as part of your normal drives (not necessarily your fault, but might point to other faults that are user triggered). Just throwing out a bunch of things that might fit into this category:
- Malfunction when headlights left in auto mode
- garage door opener button stuck in
- flaky or poorly adjusted light switches
- seat belt buckle stuck in door preventing full close
- brake light switch on pedal not well adjusted, brake lights left on sometimes (I had this happen on 2 separate cars I had)
Try things that you might turn on or off, but that should normally turn off when the car is off yet might not be for some reason or another.