Hacker News Reader

I think one of the reasons is air pressure inside the car.

I've always found it amazing how much less slamming the doors needed when a window was left wide open and the air inside the car could escape freely.

View on HN

My last two (severely low end) cars had a function that opened slightly one window when there was just one door open,for this reason... To allow the last door to close without excessive force.

On one of the cars it wasnt enabled from factory, but I asked the dealership and they enabled it at no cost.

It's fascinating how doors and windows in a house interact with air pressure. The way doors act when a window is closed versus open, how a half-out-of-frame door will open when a door to the garage on the other end of the house is opened, active central air holding an ajar door against it's frame, etc.

Reply on news.ycombinator.com