system
Given the following post, respond as if you're commenting on Reddit:
human
What is the quickest way to cool down the interior of a car?
gpt
Welp.. this thread is depressingly devoid of good info.

* All windows rolled down, moon roof open.
* A/C on full blast at feet and on outside vent
* Drive until temperature inside matches outside.
* Close windows and and adjust A/C to blow at feet and head.
* Put A/C on cabin recirculate.
* Enjoy rapidly temperature dropping car.

Preventing heat: 

* Park in the shade.
* Use those sun shades. That much less light landing on your dark dash really does help.
* Windows down a bit.
* Moon roof open to vent.

Source: Lived in Las Vegas, where dashboards could melt in the right sun.