They tend to keep their office doors closed. Always knock on doors before entering. Objective criticism isn't given or received easily. Compliments are seldom given for work product. Strict vertical hierarchy exists.
Power is held by a small number of people at the top.
Deference is given to authority. Subordinates rarely contradict or criticize the boss publicly. Decision making is slow with thorough analysis of all facts. Germans are not comfortable handling the unexpected. Germans produce massive written communications to elaborate on and confirm discussions.