The calculated distance (air line) between Mannheim and Dannstadt-Schauernheim is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Dannstadt-Schauernheim is certainly longer, as only the direct route (as the crow flies) between Mannheim and Dannstadt-Schauernheim has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles