Used car for a student

Moin Moin, I am a student and would like to buy a car. I will only drive 99% in the city with the car. The box should be inexpensive in maintenance (consumption, insurance etc.) and of course reliable. I could spend 2000€ for the car, it can also be 230€ if the car is then much better and cheaper because of the 300€. Tax and insurance are paid from another pot. I hope you can help me find a reliable and cheap car. Thank you in advance.