Tap F to exit vehicle with engine on. Hold F to exit with engine off. Implemented via CLEO Redux.
I love the subtle, realistic immersion GTA IV's feature adds, but unfortunately the only faithful implementation I could find is an ancient 2012 script known to cause crashes. So this is my first script. I thought I may as well share it.
Please note: This may cause performance issues on older PCs. Whilst on my PC I didn't notice any noteworthy impact, the script constantly runs not driving/driving checks in the background to function as expected. I'll look into optimizing the code if its found to be a performance hog.