Traveling from Hannover to Mannheim, you have the option of the ICE (InterCity Express) train, which can travel at speeds of up to 300 km/h. The journey typically takes around 3 to 3.5 hours, depending on the specific service chosen. The ICE offers comfortable seating, onboard catering, and free Wi-Fi. Alternatively, the IC (InterCity) train serves this route as well, usually taking slightly longer, around 4 hours, and operates at speeds of up to 200 km/h. Both trains provide a reliable and efficient travel experience across Germany.