Care & Feeding - Side Window and Usage
Only the small inset in the side windows actually rolls town. Because of its size, it is referred to as the "toll both" window as it could be used for handing money to a toll both operator. It is not very useful for ventilation (thank god the DeLorean has A/C).
Because of its size, it can be awkward to use. In drive-thrus, I generally open the door as the window is too small to be useable for such things. This is usually not a problem as the doors do not swing out very far. I havent really found a good use for the windows aside from lowering them slightly to keep the interior from getting too hot while parked.