[muawiyah]

Your typical cat takes several minutes to toke up to operating temperature. That means raw, unburned fuel is flowing past it out into the atmosphere.

BMW "solved the problem" by adding an electric heating coil that tokes it up to operating temperature in seconds.

Operating temperature is about 1300 degrees F.

Again, I'm postulating that this particular BMW had the new, improved, high efficiency catalytic convertor.

I've also found a way to explain why she's in a car with the garage doors still locked ~ that's the use of a remote keyless starter array! There's a lot of flexibility in the way they can be set up (depending on brand and cost), so maybe 1 button opens the windows and 2 buttons starts the engine, or vice versa, or maybe just proximity to the "fob" is enough for the system to decide to start the engine.

The keyless starter system is standard with this vehicle.

[Gabrial]

“I've also found a way to explain why she's in a car with the garage doors still locked”

The car had been partially backed out of the garage. I think the door was opened and the car partially backed out.

[moehoward]

Keyless start could have been added, but it doesn’t appear to be standard. Converters for that 2008 BMW X5 model appear to be the regular garden variety.

Whenever someone who has worked with the sorts she has, then dies in a curious way.............