This morning in Harburg Rathaus, the display over one of the platforms read "Bitte nicht einsteigen — do not board".
I think that was the first time I had seen the subtitle (the one in English) on a HVV display.
But the more amusing thing was that the next time I looked, it said "S31 Altona, in 55 Min.".
Which was kind of true, I suppose; the next scheduled train on that platform would be an S31, and it would be in 55 minutes.
But that wasn't the next S31; that would be in 5 minutes, on the other platform (since in the mornings, S31's don't start in Harburg Rathaus but in Neugraben, and they run from the other platform then together with the S3's). So it was kind of true yet kind of misleading at the same time.