"13 Uhr mittags" is a spoof on "High Noon", which is called "12 Uhr mittags" in Germany. Parodistic elements include the title as well as the plot and the name of the female police agent who is named Gracia Keller - a tribute to "High Noon's" principal actress Grace Kelly.
Apart from quotations of American westerns, a lot of references to Spaghetti westerns can also be found - especially in terms of camera settings as well as in the soundtrack.