In Haylias, Stan turns to Klaus for advice about what to with Hayley now that he's activated her sleeper cell training. Though it's entirely one-sided as he's just interrupting Klaus as he's trying to read. Klaus finally gets fed up and calmly tells Stan this:
Klaus: I think you only turn to me when you have no one else to turn to. I think you really don't care what I have to say and you just like listening to yourself talk. I think you are a selfish bastard and I think you can go to Hell!
Stan (shocked): Wow. Okay. Uh, well I guess I'll ask someone else what-
Klaus: Yes, why don't you go do that.