Definitely at least a side of half a weel

From what I remember the last time I heard an Italian kid mispronounce spaghetti they just skipped the s so the result was paghetti.

Defnitely a wheel, not necessarily a car

The one detail I haven’t seen in the other comments would be to recirculate the air inside the car, so the car doesn’t have to cool the hot air from outside, but instead only cool the already cooler air from the inside. To be the most optimal if your car has been in the sun you should make it draw air from the outside until it’s a little cooler than the outside then recirculate

No hole in the middle, filled donut stuck to a toast maybe?

Absolutely

A calzone, the ends aren’t open. A wellington is usually shown cut but that doesn’t change its identification