What cultural faux pas should I try to avoid making in Munich?

"It is important to be aware of cultural norms when visiting Munich. It is considered impolite to be late for appointments or social engagements, so it is important to arrive on time. It is also important to dress appropriately for the occasion, as dressing too casually or too formally can be seen as disrespectful. Additionally, it is important to be aware of the local customs and to show respect for them. For example, it is considered rude to point with your index finger, so it is best to use an open hand when gesturing. Finally, it is important to be aware of the local language and to make an effort to learn some basic phrases," mentioned another expat when asked about moving to Munich, Germany.