Nothahn Update

Some time ago I reported on a NYC MTA bus engineering test.  At the time, I asked for translations of the German word "Nothahn" appearing on a sign.  Courtesy of the FailBlog, I think I might know what Nothahn means:

Although, this is clearly a mistranslation, I believe that we can deduce that Nothahn means "Emergency Lock," similar to some of the suggestions we got in the comments back then.  Mystery solved!