Frankfurt Airport (FRA) – Best option (~1 hour drive) Major international hub with direct flights from California (LAX, SFO). Easiest option for car rentals and train connections.

Requirements : U.S. Driver’s License (valid for short-term visitors). International Driving Permit (IDP) – Not always required but recommended. Credit Card (most rentals require one). Rental Process Book in advance through companies like Sixt, Hertz, Europcar, or Enterprise. Pick up from Frankfurt Airport for convenience. Many cars are manual transmission – specify automatic when booking. Insurance is highly recommended (check if your credit card covers rental insurance).