Tarantino loves Kubrick. I'm not sure if the OP worded the post wrong but 'The Killing' is everything QT wanted to do in films with the non-conventional narratives, Chapter Lists, being heavily involved in getting costume design correct and other small details that many people overlook.

I'd say The Killing was also a big influence on Tarantino (Tarantino even called it the best heist movie ever made). Perhaps Tarantino likes Kubrick better than he actually realizes I always found Tarantino to be a modern day Kubrick to begin with - not in term of overall quality of his movies and his directing, I want to stress this.

Oh, no doubt. I wasn't implying that the accent itself was copied. i was agreeing with the OP that the convoluted plan was similar.
In terms of the accent, there are many different types of German accents. And Kruger's reminded me instantly of Waltz. Perhaps they're from the same region? Or they learned English the same way? Just for example, Arnold Schwarzenegger is from Austria and his accent doesn't sound anything like theirs.

Hardy Kruger (who played Potzdorf) is German, and so spoke in a German accent.
Waltz is Austrian-German, and so speaks in a similar accent.
It has nothing to do with Tarantino.

I'm glad you posted this. I was thinking Capt. Potzdorf's accent sounded exactly like Christoph Waltz's. And now that you mention the briefing scene and the highway robbery scene, there's clearly echoes. I wonder if Quentin Tarantino had them subconsciously in mind or if they're just so generic that it's a coincidence.

Intersting . The captain feeny scene maybe .