Yes, you can generally drive a rental car from Switzerland to Germany in 2026, but you must follow specific cross-border protocols. When you pick up the car in Switzerland, you are required to inform the rental agency of your intent to enter Germany. Most major companies (Hertz, Avis, Europcar) allow this because both countries are in the Schengen Area, meaning there are no permanent passport checks at the border. However, you will likely be charged a "Cross-Border Fee" to cover the extended insurance and roadside assistance required outside Switzerland. Additionally, you must ensure the car has a valid German "Umweltplakette" (environmental sticker) if you plan to drive into German "Green Zones" (low-emission city centers). While the Swiss "Vignette" for highways is likely already on the car, Germany’s autobahns remain largely toll-free for passenger cars in 2026. Failure to declare the border crossing can void your insurance and lead to heavy penalties if you are involved in an accident or a breakdown in Germany.