First job in Munich without fluent German.

That becomes complicated to find a job without a good level of German  apart bank and scientific area... Even in sales and marketing, you need to speak German...

I would say ESPECIALLY in sales and marketing, you need to speak the language of your customers well. In Germany, that is German.
Maybe you can focus on international sales jobs at foreign companies, or work in another field where the language isn't that important?
Germany currently has the lowest unemployment rate in living memory, the economy is buzzing along, the working population started to decline and the media is full of talk about manpower shortages (albeit mostly in the technical domain). Job market wise, we never had it as good as now!