Bernese Oberland travel tips
Unless you have planned to visit really remote areas, a car is not necessary to explore the Bernese Oberland. There is a fantastic network of trains, buses and cable cars that go almost anywhere. Please find a comparison between modes of traveling here.
The Jungfrau region is car-free beyond Grindelwald and Stechelberg (near Lauterbrunnen). The villages of Wengen, Mürren and Gimmelwald cannot be reached by car, so they're very attractive to enjoy the alpine scenery without any nearby traffic.