Character mistake: As Stauffen parts company with Col. Hogan at the road checkpoint, he salutes Hogan. While that is understandable under the circumstances - after all Hogan just saved his life, it would also be highly suspicious. Both Schultz and Stauffen's adjutant were watching them, so it can't be said they did it surreptitiously either. After all, Stauffen is a German general whereas Hogan is an allied prisoner officer of inferior rank. For an officer of higher rank to initiate the salute is a demonstration of great respect and/or thanks, which, as far as anyone besides Stauffen and Hogan knew, was not warranted in this situation.
Character mistake: 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.
Suggested 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.
