While the car was plugged in overnight in the garage, (it is a hybrid), a terrible odor was released and carbon monoxide was detected. fire department was called twice (this occurred two nights in a row) and detected high levels of co from inside the car and from the hood. we needed to evacuate the house each time. gas company and plumber confirmed there was no other issues in garage. upon removal of the car, issues no longer persist. bmw cannot find anything wrong with the car, but i refuse to take the car back, given safety for my family. the vehicle was parked, turned off, locked, and charging overnight.