the most probable reason why it was commented out is because it has some problems with the client's sounds loading, for example this happened twice or thrice... when i had those features turned on the players on my server said that they crashed after going close to the vehicle that had the features on, so thats why its disabled by default and for the impacts case its most likely not buggy like wat i stated above
jetsound idk
squealsound is the tires sliding sound
wheelimpactsound is the tires impact sound but since theres already a body impact sound so it wouldnt be needed unless you want 100% realism
enginesound is when the car shifts into the "forward gear" and plays it, once you have gone up to the maximum top speed the engines pitch will increase, if the engine is back into the idle position its pitch would be decreased i think... but heres the catch, the idlesound DOES not play even after you have gone idle
idlesound is when the vehicle is spawned and it will play that specific engine sound ( pretty much lol )
jetsound is the jet/plane/car/boat's jetting sound i think, didnt really experiment with this since it was rendered redundant over the enginesound feature ( pls hepl by adding info for this )
