That depends largely on where you’ll be wandering. Downtown Kassel, about 9 miles from Kassel Airport (KSF-Calden), can be a challenge to drive in. Keep things easy by choosing something small, fuel-efficient, and a cinch to handle. Keep in mind that Kassel is also the gateway to many of the foothills in Hessen. If your trip is more about tearing down the open road, then you may like something with a bit more comfort and room to move about. How about a full-size car or a standard SUV?