Punctuality
Germans are most comfortable when they can organise and compartmentalise their world into controllable units. Time, therefore, is managed carefully, and calendars, schedules and agendas must be respected. Trains arrive and leave on time to the minute, projects are carefully scheduled, and organisation charts are meticulously detailed.
Do not turn up late for an appointment or when meeting people. Germans are extremely punctual, and even a few minutes delay can offend. If you are going to be even slightly late, call ahead and explain your situation. Be five to 10 minutes early for important appointments.