: Always knock before entering a closed door, even in an office setting. Avoid adding people on social media whom you have only just met; Germans generally prefer to keep their digital circles private.
: Germans value honesty over "polite" small talk. It is common to receive direct feedback, which is not intended as an insult but as efficiency.
: Do not cross the street on a red light, even if no cars are coming. This is culturally fundamental, especially when children are present, as you are expected to be a role model.
: Most shops are closed, and loud activities—like mowing the lawn or washing a car—are prohibited to maintain public peace. Social Etiquette & Interaction
: Maintaining a low volume is essential. In "quiet zones" on trains ( Ruhebereich ) or in waiting rooms, keep conversations to a whisper and use headphones for any media.