Call ahead. Hopefully by the time you’re ready for the test drive you’ve narrowed your list down to just one or a few models. It’s best to drive all the models you’re considering on the same day, and to make sure that you can get in the exact model you want for a long drive. Ideally, tell them you want to spend a couple of hours in the vehicle. Some dealers will balk at that length, but take that as a test. If they resist, go elsewhere.