I originally reserved a five-seater SUV, but they upgraded me to a seven-seater. The Ford FLEX is too long for convenient parking, so I requested a change. They gave me a Ford Explorer with just over 20,000 kilometers on it, equipped with 4WD and hill descent control. Many thanks to the American lady at the AVIS parking lot at Salt Lake City Airport, who patiently used the translation app to communicate with me and helped me get the car change. This made my driving experience in Yellowstone Park extremely comfortable.