Generally, it is advisable to open a bank account for your stay in Germany. Alternatively, a bank account in your own EU country using the euro can be used.
If you have further queries, contact Ms. Svenja Beljaars [2] or Ms. Maren Plugge [3] in Administration.
Links:
[1] https://www.mpim-bonn.mpg.de/taxonomy/term/109
[2] https://www.mpim-bonn.mpg.de/node/3197
[3] https://www.mpim-bonn.mpg.de/node/6851