Corrected entry: When Major Hagel is going down the list of his knowledge of Hogan's Heroes, he mentions that their code name is Goldilocks. Throughout the series, the code was also Mama Bear, but the most used code name was Papa Bear.
Corrected entry: As the scene fades to the Höf Brau (with lighting that would violate black out rules in wartime Germany) passing vehicles can be seen to be modern (mid-1960's) cars rather than the more appropriate early 1940's German vehicles. And they're travelling at 1960's standards speeds.
Correction: Only the headlights of the cars are visible for less than a second, plus, the reporter presumes to accurately judge speeds of cars in a movie scene, which would be difficult at best. Furthermore the mistake depends on the assumption that speeds were significantly different inside closed settlements between 1940 and 1960, which they were not. Legally, in Germany, 40 km/h would be permissible in 1942 whereas 50km/h would be permissible in 1960. In California, the speed limit would have been between 25 and 30 mph, or 40-48 km/h respectively. Even in real life, accurately judging a speed difference of 8km/h would be almost impossible except in direct comparison. This mistake should probably be upheld in part, but either it must be rewritten without the speed stuff, or a comprehensible explanation must be given how the difference in speed is to be explained and judged.
Correction: The Heroes used all of these codenames. Papa Bear is the codename of Hogan himself, Goldilocks is the codename of the whole team around Hogan, and Mama Bear is the codename of the U-Boat they're in contact with.