There are no more trains/trams which cover the Mannheim - Ludwigshafen through the Konrad Adenauer bridge.

Berliner Platz in Ludwigshafen looks like an abandoned old tram stop.

You ought to get in from Kaiser-Wilhelm-Straße or from Ludwigstraße, if you are in Ludwigshafen and you want to get to Mannheim.

Source: https://netz.rnv-online.de/index.php/de/netzplan