Originally Posted by ShereKhan
In the 530d demo car I had a few months ago. I tried an experiment.
The car was started and I walked away from car and noted it carried on running.
I had an Infiniti "M" with keyless start and,once or twice,I walked away from the car,still running,with the keyfob in my pocket.It would beep and,upon hearing the beep,I immediately went back to the vehicle so I,like you,am not sure what would have happened if I kept walking.One would think for several reasons,however,that it would stop running at some point.but that's just a hunch on my part.