This story did not look quite like that.
In this area, the Germans had a training tank unit equipped with captured Russian T-34 tanks. This unit has used the bridge in question many times before. Therefore, when a marching column of five Russian tanks appeared, the Nazis took it for their tanks. And the Russian column without any obstacles, without a single shot, went to the bridge and entered the battle.
I describe the battle according to Russian archival sources - award lists for distinguished servicemen, as well as the memoirs of direct participants in the events, stored in the museum of the Battle of Stalingrad.
Here is their photo, of course, in Russian: