Bing found the following results
Mannheim - Wikipedia
Mannheim Map - Karlsruhe Region, Baden-Württemberg, Germany - Mapcarta
Mannheim Maps | Germany | Maps of Mannheim - World Maps
Google Maps
Mannheim | Germany, Map, & History | Britannica
Mannheim - Google My Maps
Large detailed map of Mannheim - Ontheworldmap.com
Mannheim, Germany - Google My Maps
MICHELIN Mannheim map - ViaMichelin
Official City Map of Mannheim | Mannheim.de